files for the NatImExperiment
change to show only nat phs whn and not org anymore, changed randomization accordingly
Added bias field to stim params trials to facilitate block grouping
Fixed error with recording bias in stim file when cue == 0 with if clause
added addCoh param to config file for WNOriDetectExperiment
fixed bug affecting ori tuning so it saves oriPre from both stimulus locations
changed orientationsAll to include orientation set for full trial for both stimulus locations
changed oriCoh and oriPost to report both locations, oriPre and orientationsAll already did this, just being more consistent
implemented orthogonal signal option
Merge branch 'master' of https://github.com/gdenfield/stim_ae

Note: these are changes in Leon's code that were accidentally committed by George

Conflicts:
	exp/@NatImExperiment/netShowStimulus.m
	exp/@NatImExperiment/netStartSession.m
	rand/@NatImRandomization/init.m
Removed unused code
Removed catch trials from conditions

Catch trials are now determined when nFramesPre is drawn: it's a catch
trial if nFramesPre > nFramesPreMax.
Merge branch 'catchtrials' of github.com:aecker/stim_ae into catchtrials