Intermediate commit
Fixed bug in deleting calendar events
Cleaned up some stuff in viewcontroller
Merge remote-tracking branch 'origin/calendar'

Conflicts:
	ScheduleSharer/ScheduleSharer.xcodeproj/project.pbxproj
	ScheduleSharer/ScheduleSharer/Controller/AddScheduleViewController.m
	ScheduleSharer/ScheduleSharer/Model/CalendarManagerModel.m
	ScheduleSharer/ScheduleSharer/Model/DataBase/Events+Management.h
	ScheduleSharer/ScheduleSharer/Model/DataBase/Events+Management.m
	ScheduleSharer/ScheduleSharer/Model/DataBase/Events.h
	ScheduleSharer/ScheduleSharer/Model/DataBase/Events.m
	ScheduleSharer/ScheduleSharer/Model/DataModel.xcdatamodeld/DataModel.xcdatamodel/contents
	ScheduleSharer/ScheduleSharer/Model/ScheduleManagerModel.h
	ScheduleSharer/ScheduleSharer/Model/ScheduleManagerModel.m
	ScheduleSharer/ScheduleSharer/Utilities/Constants.m