Enabled baseline condition for fMRI sessions

	modified:   mcode/UIRecorder.m
	new file:   mcode/char_symbol.m
	modified:   mcode/expt_config_fmt.example.txt
	modified:   mcode/expt_config_pitch.example.txt
	modified:   mcode/genRandScript.m
	modified:   mcode/runExperiment.m