Add and modified GetCalendarItemController and GetCalendarItemRequestObserver

Signed-off-by: Hui Zheng <hzheng@wpi.edu>
Merge branch 'Database' of github.com:Tommzy/wpi-suite into Database

Conflicts:
	Calendar/src/edu/wpi/cs/wpisuitetng/modules/calendar/controller/AddCalendarItemController.java
	Calendar/src/edu/wpi/cs/wpisuitetng/modules/calendar/controller/AddCalendarItemRequestObserver.java