Function isoToUnixSec( isoDate )

Description:
Converts an ISO8601 date string to seconds since 1970-01-01. The basic format of the isoDate argument is yyyy-mm-ddThh:mm:ss.s, though some deviations from this form are permitted: Some legal examples are therefore: "1994-12-21T14:18:23.2", "1968-01-14", and "2112-05-25 16:45Z".
Parameters:
isoDate (String)
date in ISO 8601 format
Return Value (floating point):
seconds since the Unix epoch
Examples:
Signature:
double isoToUnixSec(String)