Added sentence "The pet cat gave birth to kittens"
New UI options
	Presentation of "N" and "R" as hint to the user. Option:
	showRhythmHint in expt_config file

	audRhythmAlways: always present rhythmic beats regardless the type
	of trial.

	trialTypes: can be used to adjust the number of different types of
	trials in an fMRI experiment (applies only under trigByScanner ==
	0)