Iris Auxiliary Code

mainly updated arena_controller by making rotations variable: they can go in the same direction as the master perturbation, opposite, or do not move at all: this way can mix together, negative mismatch stimuli, positive mismatch stimuli, pure stage rotations, pure VF rotations

added initialization to miniscope recorder - now don't need to open native miniscope software
modified Arena_controller.vi - now durations of vf and arena are dissociated from the duration of perturbation - for more flexibility

variabilized expTime. again?

added block that saves parameters of Arena_controller.vi if it's open (analogue of VR_controller.vi)