Merge pull request #1 from aecker/master

Renamed parameters according to our discussion
Small fixes to work with state chart.  Matlab 2007b doesn't support ~ as an output
argument and we made netShowStimulus compute the response window.
set params.stimulusLocation = stimLoc and added this to return function call so LabView can set response window to stimulus location
Added option to use random signal
Colored fixation spot according to bias in current block