More changes to DateTimeChooser
Finished DateTimeChooser
Merge branch 'dev' into feature/DateTimePicker

Conflicts:
	Calendar/src/edu/wpi/cs/wpisuitetng/modules/calendar/view/utilities/DateUtilities.java
	Calendar/test/edu/wpi/cs/wpisuitetng/modules/calendar/model/UtilitiesTest.java
Added a new TimeDurationChooser based off the new DateTimeChooser and integrated it with the event tab.
More changes to DateTimeChooser integration with AddEventsTab
Merge branch 'dev' into feature/DateTimePicker

Conflicts:
	Calendar/src/edu/wpi/cs/wpisuitetng/modules/calendar/view/CalendarTabPanel.java
	Calendar/src/edu/wpi/cs/wpisuitetng/modules/calendar/view/calendarview/month/DayPanel.java
	Calendar/src/edu/wpi/cs/wpisuitetng/modules/calendar/view/utils/DateUtils.java
utils vs utilities