don't need to check for visual location to click
Merge branch 'changes-after-qn-actr'
move 200px/second
Merge branch 'changes-after-qn-actr'
made function and supporting functions for producing target start locations
subtract off half size from x and y when creating buttons
because add-button wants top left location and not center
inset rectangle by half target size
fixed logic in combining constraints
made test function for adding 100 buttons
generate button movement randomly as we do in experiment
Merge branch 'target-positioning'