added room availability feature
push
got rid of hour(s) now hours, hour, or nothing//same for minutes
more comments
if user clicks create event button, activity finishes, clicking back on
the webscreen will return to room select activity
Merge remote-tracking branch 'origin/pr/5'

Conflicts:
	Cows-Mobile-Client/gen/com/zennenga/cows_mobile_client/R.java
	Cows-Mobile-Client/res/layout/activity_event_creation.xml
	Cows-Mobile-Client/res/layout/activity_recurrence.xml
	Cows-Mobile-Client/res/layout/activity_room_event_view.xml
	Cows-Mobile-Client/res/layout/activity_room_select.xml
	Cows-Mobile-Client/res/values/strings.xml
	Cows-Mobile-Client/src/com/zennenga/cows_fields/BaseField.java
	Cows-Mobile-Client/src/com/zennenga/cows_fields/BuildingField.java
	Cows-Mobile-Client/src/com/zennenga/cows_fields/MultiSpinnerField.java
	Cows-Mobile-Client/src/com/zennenga/cows_fields/TimeField.java
	Cows-Mobile-Client/src/com/zennenga/cows_mobile_client/RoomListener.java
	Cows-Mobile-Client/src/com/zennenga/utility/Validator.java