Added some participant functionality to the Event class.
Merge branch 'dev' of http://github.com/tomorrow-nf/wpi-suite-team5 into dev

Conflicts:
	Calendar/src/edu/wpi/cs/wpisuitetng/modules/calendar/models/SortEvents.java
	Calendar/test/edu/wpi/cs/wpisuitetng/modules/calendar/models/entry/SortEventsTest.java
Merge branch 'dev' of http://github.com/tomorrow-nf/wpi-suite-team5 into dev
Merge branch 'dev' of http://github.com/tomorrow-nf/wpi-suite-team5 into dev