Added trial type to title in the data monitor.
Fixed a bug related to utterWords
Improving the efficiency of preprocRHYData

Added change detection code to several routines and make the routines
write pdata to disk only when there is a change.

	modified:   mcode/asrOkay_cbk.m
	modified:   mcode/comments_cbk.m
	modified:   mcode/gen_vwl_fmts_trial_cbk.m
	modified:   mcode/ostOkay_cbk.m
	modified:   mcode/pertOkay_cbk.m
	modified:   mcode/rating_cbk.m
	modified:   mcode/updateParamsUI.m