Computation times

00:15.442 total execution time for 6 files from examplesstimuli:

Example	Time	Mem (MB)
Generating a stimulus from an image (plot_image_stim.py)	00:06.652	0.0
Generating a stimulus from a video (plot_video_stim.py)	00:05.751	0.0
Generating a drifting sinusoidal grating or drifting bar stimulus (plot_psychophysics.py)	00:01.178	0.0
Generating monophasic and biphasic pulses (plot_pulses.py)	00:00.760	0.0
Generating a sinusoidal pulse train (plot_sinusoidal.py)	00:00.707	0.0
Generating pulse trains (plot_pulse_trains.py)	00:00.394	0.0