DOC: edited log parameters in all docstrings, updated examples in Update and Unshow
DOC: added docstring for FreeKey, minor edits to video.py
DOC: added docstring for MousePress and KeyPress, edited log parameters in FreeKey
DOC: added docstring for Pulse, edited docstring for KeyPress
DOC: edits to experiment.py, edits to log parameters
DOC: docstrings for experiment.py, edits to log parameters in freekey, keyboard, mouse, pulse, and video
Merge pull request #4 from eweich/master

DOC: updated docstrings for experiment.py, video.py, freekey, mouse, keyboard, and pulse