Added calender event generation when creating a new assignment

Initial code for adding a calender event to the user's google calender.
-user's date to be added after datatypes are fixed
Merge remote-tracking branch 'origin/master'

Conflicts:
	AssignmentTracker/bin/AssignmentTracker.apk
	AssignmentTracker/bin/classes.dex
	AssignmentTracker/bin/classes/com/example/assignmenttracker/AddAssignmentActivity.class
	AssignmentTracker/bin/resources.ap_