						  GNU GENERAL PUBLIC LICENSE
							  Version 3, 29 June 2007

 Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
 Everyone is permitted to copy and distribute verbatim copies
 of this license document, but changing it is not allowed.

 Preamble

 The GNU General Public License is a free, copyleft license for
 software and other kinds of works.

 The licenses for most software and other practical works are designed
 to take away your freedom to share and change the works.  By contrast,
 the GNU General Public License is intended to guarantee your freedom to
 share and change all versions of a program--to make sure it remains free
 software for all its users.  We, the Free Software Foundation, use the
 GNU General Public License for most of our software; it applies also to
 any other work released this way by its authors.  You can apply it to
 your programs, too.

 When we speak of free software, we are referring to freedom, not
 price.  Our General Public Licenses are designed to make sure that you
 have the freedom to distribute copies of free software (and charge for
 them if you wish), that you receive source code or can get it if you
 want it, that you can change the software or use pieces of it in new
 free programs, and that you know you can do these things.

 To protect your rights, we need to prevent others from denying you
 these rights or asking you to surrender the rights.  Therefore, you have
 certain responsibilities if you distribute copies of the software, or if
 you modify it: responsibilities to respect the freedom of others.

 For example, if you distribute copies of such a program, whether gratis
 or for a fee, you must pass on to the recipients the same freedoms that
 you received.  You must make sure that they, too, receive or can get the
 source code.  And you must show them these terms so they know their
 rights.

 Developers that use the GNU GPL protect your rights with two steps:
 (1) assert copyright on the software, and (2) offer you this License
 giving you legal permission to copy, distribute and/or modify it.

 For the developers' and authors' protection, the GPL clearly explains
 that there is no warranty for this free software.  For both users' and
 authors' sake, the GPL requires that modified versions be marked as
 changed, so that their problems will not be attributed erroneously to
 authors of previous versions.

 Some devices are designed to deny users access to install or run
 modified versions of the software inside them, although the manufacturer
 can do so.  This is fundamentally incompatible with the aim of
 protecting users' freedom to change the software.  The systematic
 pattern of such abuse occurs in the area of products for individuals to
 use, which is precisely where it is most unacceptable.  Therefore, we
 have designed this version of the GPL to prohibit the practice for
 those products.  If such problems arise substantially in other domains,
 we stand ready to extend this provision to those domains in future
 versions of the GPL, as needed to protect the freedom of users.

 Finally, every program is threatened constantly by software patents.
 States should not allow patents to restrict development and use of
 software on general-purpose computers, but in those that do, we wish to
 avoid the special danger that patents applied to a free program could
 make it effectively proprietary.  To prevent this, the GPL assures that
 patents cannot be used to render the program non-free.

 The precise terms and conditions for copying, distribution and
 modification follow.

 TERMS AND CONDITIONS

 0. Definitions.

 "This License" refers to version 3 of the GNU General Public License.

 "Copyright" also means copyright-like laws that apply to other kinds of
 works, such as semiconductor masks.

 "The Program" refers to any copyrightable work licensed under this
 License.  Each licensee is addressed as "you".  "Licensees" and
 "recipients" may be individuals or organizations.

 To "modify" a work means to copy from or adapt all or part of the work
 in a fashion requiring copyright permission, other than the making of an
 exact copy.  The resulting work is called a "modified version" of the
 earlier work or a work "based on" the earlier work.

 A "covered work" means either the unmodified Program or a work based
 on the Program.

 To "propagate" a work means to do anything with it that, without
 permission, would make you directly or secondarily liable for
 infringement under applicable copyright law, except executing it on a
 computer or modifying a private copy.  Propagation includes copying,
 distribution (with or without modification), making available to the
 public, and in some countries other activities as well.

 To "convey" a work means any kind of propagation that enables other
 parties to make or receive copies.  Mere interaction with a user through
 a computer network, with no transfer of a copy, is not conveying.

 1. Source Code.

 The "source code" for a work means the preferred form of the work for
 making modifications to it.  "Object code" means any non-source form
 of a work.

 A "Standard Interface" means an interface that either is an official
 standard defined by a recognized standards body, or, in the case of
 interfaces specified for a particular programming language, one that
 is widely used among developers working in that language.

 2. Basic Permissions.

 All rights granted under this License are granted for the term of
 copyright on the Program, and are irrevocable provided the stated
 conditions are met. This License explicitly affirms your unlimited
 permission to run the unmodified Program. The output from running a
 covered work is covered by this License only if the output, given its
 content, constitutes a covered work. This License acknowledges your
 rights of fair use or other equivalent, as provided by copyright law.

 3. Protecting Users' Legal Rights From Anti-Circumvention Law.

 No covered work shall be deemed part of an effective technological
 measure under any applicable law fulfilling obligations under article
 11 of the WIPO copyright treaty adopted on 20 December 1996, or similar
 laws prohibiting or restricting circumvention of such measures.

 4. Conveying Verbatim Copies.

 You may convey verbatim copies of the Program's source code as you
 receive it, in any medium, provided that you conspicuously and
 appropriately publish on each copy an appropriate copyright notice;
 keep intact all notices stating that this License and any
 non-permissive terms added in accord with section 7 apply to the code;
 keep intact all notices of the absence of any warranty; and give all
 recipients a copy of this License along with the Program.

 5. Conveying Modified Source Versions.

 You may convey a work based on the Program, or the modifications to
 produce it from the Program, in the form of source code under the
 terms of section 4, provided that you also meet all of these
 conditions:

	a) The work must carry prominent notices stating that you modified
		the files and the date of any change.

	b) The work must carry prominent notices stating that it is
		released under this License and any conditions added under section
		7. This requirement modifies the requirement in section 4 to
		"keep intact all notices".

	c) You must license the entire work, as a whole, under this License
		to anyone who comes into possession of a copy. This License will
		therefore apply, along with any applicable section 7 additional
		terms, to the whole of the work, and all its parts, regardless of
		how they are packaged. This License gives no permission to license
		the work in any other way, but it does not invalidate such
		permission if you have separately received it.

	d) If the work has interactive user interfaces, each must display
		Appropriate Legal Notices; however, if the Program has interactive
		interfaces that do not display Appropriate Legal Notices, your
		work need not make them do so.

 6. Conveying Non-Source Forms.

 You may convey a covered work in object code form under the terms of
 sections 4 and 5, provided that you also convey the machine-readable
 Corresponding Source under the terms of this License, in one of these
 ways:

	a) Convey the object code in, or embodied in, a physical product
		(including a physical distribution medium), accompanied by the
		Corresponding Source fixed on a durable physical medium
		customarily used for software interchange; or,

	b) Convey the object code in, or embodied in, a physical product
		(including a physical distribution medium), accompanied by a
		written offer, valid for at least three years and valid for as
		long as you offer spare parts or customer support for that product
		model, to give anyone who possesses the object code either (1) a
		copy of the Corresponding Source for all the software in the
		product that is covered by this License, on a durable physical
		medium customarily used for software interchange, for a price no
		more than your reasonable cost of physically performing this
		distribution, or (2) access to copy the Corresponding Source from
		a network server at no charge.

	c) Convey individual copies of the object code with a copy of the
		written offer to provide the Corresponding Source. This alternative
		is allowed only occasionally and noncommercially, and only if you
		received the object code with such an offer, in accord with
		subsection 6b.

	d) Convey the object code by offering access from a designated place
		(gratis or for a charge), and offer equivalent access to the
		Corresponding Source in the same way through the same place at no
		further charge. You need not require recipients to copy the
		Corresponding Source along with the object code. If the place to
		copy the object code is a network server, the Corresponding Source
		may be on a different server (operated by you or a third party) that
		supports equivalent copying facilities, provided you maintain clear
		directions next to the object code saying where to find the
		Corresponding Source. Regardless of what server hosts the
		Corresponding Source, you remain obligated to ensure that it is
		available for as long as necessary to satisfy these requirements.

	e) Convey the object code using peer-to-peer transmission, provided
		you inform other peers where the object code and Corresponding
		Source of the work are being offered to the general public at no
		charge under subsection 6d.

 A separable portion of the object code, whose source code is excluded
 from the Corresponding Source as a System Library, need not be
 included in conveying the object code work.

 7. Additional Terms.

 "Additional permissions" are terms that supplement the terms of this
 License by making exceptions from one or more of its conditions.
 Additional permissions that are applicable to the entire Program shall
 be treated as though they were included in this License, to the extent
 that they are valid under applicable law. If additional permissions
 apply only to part of the Program, that part may be used separately
 under those permissions, but the entire Program remains governed by
 this License without regard to the additional permissions.

 When you convey a copy of a covered work, you may at your option
 remove any additional permissions from that copy, or from any part of
 it. (Additional permissions may be written to require their own
 removal in certain cases when you modify the material.) You may add
 additional permissions to a covered work, provided that you also make
 them available under the terms of this License.

 Notwithstanding any other provision of this License, for material you
 add to a covered work, you may (if authorized by the copyright owners of
 that material) supplement the terms of this License with terms:

	a) Disclaiming warranty or limiting liability differently from the
		terms of sections 15 and 16 of this License; or

	b) Requiring preservation of specified reasonable legal notices or
		author attributions in that material or in the Appropriate Legal
		Notices displayed by works containing it; or

	c) Prohibiting misrepresentation of the origin of that material, or
		requiring that modified versions of such material be marked in
		reasonable ways as different from the original version; or

	d) Limiting the use for publicity purposes of names of licensors or
		authors; or

	e) Declining to grant rights under trademark law for use of some
		trade names, trademarks, or service marks; or

	f) Requiring indemnification of licensors and authors of that
		material by anyone who conveys the material (or modified versions of
		it) with contractual assumptions of liability to the recipient, for
		any liability that these contractual assumptions directly impose on
		those licensors and authors.

 All other non-permissive additional terms are considered "further
 restrictions" within the meaning of section 10. If the Program as you
 received it, or any part of it, contains a notice stating that it is
 governed by this License along with a term that is a further
 restriction, you may remove that term. If a license document contains
 a further restriction but permits relicensing or conveying under this
 License, you may add to a covered work material governed by the terms
 of that document, provided that the resulting work is not otherwise
 a covered work under this License.

 8. Termination.

 You may not propagate or modify a covered work except as expressly
 provided under this License. Any attempt otherwise to propagate or
 modify it is void, and will automatically terminate your rights under
 this License (including any patent licenses granted under the third
 paragraph of section 11).

 However, if you cease all violation of this License, then your
 license from a particular copyright holder is reinstated (a)
 provisionally, unless and until the copyright holder explicitly and
 finally terminates your license, and (b) permanently, if the copyright
 holder fails to notify you of the violation by some reasonable means
 prior to 60 days after the cessation.

 Moreover, your license from a particular copyright holder is
 reinstated permanently if the copyright holder notifies you of the
 violation by some reasonable means, this is the first time you have
 received notice of violation of this License, and you cure the
 violation prior to 30 days after your receipt of the notice.

 Termination of your rights under this section does not terminate the
 licenses of parties who have received copies or rights from you under
 this License. If your rights have been terminated and not permanently
 reinstated, you do not qualify to receive new licenses for the same
 material under section 10.

 9. Acceptance Not Required for Having Copies.

 You are not required to accept this License in order to receive or run a
 copy of the Program. Ancillary propagation of a covered work occurring
 solely as a consequence of using peer-to-peer transmission to receive a
 copy likewise does not require acceptance. However, nothing other than
 this License grants you permission to propagate or modify any covered
 work. These actions infringe copyright if you do not accept this
 License. Therefore, by modifying or propagating a covered work, you
 indicate your acceptance of this License to do so.

 10. Automatic Licensing of Downstream Recipients.

 Each time you convey a covered work, the recipient automatically
 receives a license from the original licensors, to run, modify and
 propagate that work, subject to this License. You are not responsible
 for enforcing compliance by third parties with this License.

 11. Patents.

 A "contributor" is a copyright holder who authorizes use under this
 License of the Program or a work on which the Program is based. The
 work thus licensed is called the contributor's "contributor version".

 A contributor's "essential patent claims" are all patent claims owned
 or controlled by the contributor, whether already acquired or
 hereafter acquired, that would be infringed by some manner, permitted
 by this License, of making, using, or selling its contributor version,
 but do not include claims that would be infringed only as a consequence
 of further modification of the contributor version. For purposes of
 this definition, "control" includes the right to grant patent sublicenses
 in a manner consistent with the requirements of this License.

 Each contributor grants you a non-exclusive, worldwide, royalty-free
 patent license under the contributor's essential patent claims, to make,
 use, sell, offer for sale, import and otherwise run, modify and propagate
 the contributor version.

 In the following three paragraphs, a "patent license" is any express
 agreement or commitment, however denominated, not to enforce a patent
 (such as an express permission to practice a patent or covenant not to
 sue). To "grant" such a patent license to a party means to make such an
 agreement or commitment not to enforce a patent against the party.

 If you convey a covered work, knowingly relying on a patent license,
 and the Corresponding Source of the work is not available for anyone to
 copy, free of charge and under the terms of this License, through a
 publicly available network server or other readily accessible means,
 then you must either (1) cause the Corresponding Source to be so
 available, or (2) arrange to deprive yourself of the benefit of the
 patent license for this particular work, or (3) arrange, in a manner
 consistent with the requirements of this License, to extend the patent
 license to downstream recipients. "Knowingly relying" means you have
 actual knowledge that, but for the patent license, your conveying the
 covered work in a country, or your recipient's exercising rights under
 this License in a country, would infringe one or more identifiable
 patents in that country that you have reason to believe are valid.

 If, pursuant to or in connection with a single transaction or
 arrangement, you convey, or propagate by procuring conveyance of, a
 covered work, and grant a patent license to some of the parties
 receiving the covered work authorizing them to use, propagate, modify
 or convey a specific copy of the covered work, then the patent license
 you grant is automatically extended to all recipients of the covered
 work and works based on it.

 A patent license is "discriminatory" if it does not include within the
 scope of its coverage, prohibits the exercise of, or is conditioned on
 the non-exercise of one or more of the rights that are specifically
 granted under this License. You may not convey a covered work if you
 are a party to an arrangement with a third party that is in the
 business of distributing software and under which you make payment to
 the third party for the right to provide your customers with a given
 work, and under which you grant the third party a discriminatory
 patent license (a) in connection with copies of the covered work
 conveyed by you (or copies made from those copies), or (b) in
 connection with copies of the covered work conveyed by the third party
 (or copies made from those copies). This paragraph does not limit the
 operation of the preceding paragraph.

 12. No Surrender of Others' Freedom.

 If conditions are imposed on you (whether by court order, agreement or
 otherwise) that contradict the conditions of this License, they do not
 excuse you from the conditions of this License. If you cannot convey a
 covered work so as to satisfy simultaneously your obligations under this
 License and any other pertinent obligations, then as a consequence you may
 not convey it at all. For example, if you agree to terms that obligate you
 to collect a royalty for further conveying from those to whom you convey
 the Program, the only way you could satisfy both those terms and this
 License would be to refrain entirely from conveying the Program.

 13. Use with the GNU Affero General Public License.

 Notwithstanding any other provision of this License, you have permission
 to link or combine any covered work with a work licensed under version
 3 of the GNU Affero General Public License into a single combined work,
 and to convey the resulting work. The terms of this License will continue
 to apply to the part which is the covered work, but the special requirements
 of the GNU Affero General Public License, section 13, concerning interaction
 through a network will apply to the combination as such.

 14. Revised Versions of this License.

 The Free Software Foundation may publish revised and/or new versions of
 the GNU General Public License from time to time. Such new versions will
 be similar in spirit to the present version, but may differ in detail to
 address new problems or concerns.

 Each version is given a distinguishing version number. If the Program
 specifies that a certain numbered version of the GNU General Public
 License "or any later version" applies to it, you have the option of
 following the terms and conditions either of that version or of any later
 version published by the Free Software Foundation. If the Program does not
 specify a version number of the GNU General Public License, you may choose
 any version ever published by the Free Software Foundation.

 If the Program specifies that a proxy can decide which future versions
 of the GNU General Public License can be used, that proxy's public
 statement of acceptance of a version permanently authorizes you to choose
 that version for the Program.

 15. Disclaimer of Warranty.

 THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE
 LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR
 OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND,
 EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE
 ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.

 16. Limitation of Liability.

 IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL
 ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS THE
 PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
 GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
 USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
 DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
 PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
 EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
 SUCH DAMAGES.

 17. Interpretation of Sections 15 and 16.

 If the disclaimer of warranty and limitation of liability provided above
 cannot be given local legal effect according to their terms, reviewing
 courts shall apply local law that most closely approximates an absolute
 disclaimer of all civil liability.

 END OF TERMS AND CONDITIONS

 How to Apply These Terms to Your New Programs

 If you develop a new program, and you want it to be of the greatest
 possible use to the public, the best way to achieve this is to make it
 free software which everyone can redistribute and change under these terms.

 To do so, attach the following notices to the program. It is safest to
 attach them to the start of each source file to most effectively state
 the exclusion of warranty; and each file should have at least the "copyright"
 line and a pointer to where the full notice is found.

	<one line to give the program's name and a brief idea of what it does.>
	Copyright (C) <year>  <name of author>

	This program is free software: you can redistribute it and/or modify
	it under the terms of the GNU General Public License as published by
	the Free Software Foundation, either version 3 of the License, or
	(at your option) any later version.

	This program is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
	GNU General Public License for more details.

	You should have received a copy of the GNU General Public License
	along with this program.  If not, see <https://www.gnu.org/licenses/>.

 Also add information on how to contact you by electronic and paper mail.

 If your software can interact with users remotely through a computer network,
 and you want to make sure that users interacting with your software remotely
 have the opportunity to receive the Corresponding Source of your software,
 make sure your program's source code is available from a network server at no
 charge and under the terms of this License.

 
