Renamed SpinnerDateModelHalfHour to SpinnerDateModel. Added complete error
checking in commitmenttab.
Added error checking for commitment tab.
Merge branch 'dev' of https://github.com/magwitch324/wpi-suite into dev

Conflicts:
	Calendar/src/edu/wpi/cs/wpisuitetng/modules/calendar/view/maintab/secondarytabs/CommitmentTab.java