Added an optional parameter `bPermitUnclean` to `StimulusAlignedResp()`, so that response frames that span multiple stimulus frames can be returned.
Added an optional parameter `bPermitUnclean` to `StimulusAlignedResp()`, so that response frames that span multiple stimulus frames can be returned.

emeyers/Brain-Observatory-Toolbox,emeyers/Brain-Observatory-Toolbox