AsyncChangeEvent-Class
Merge branch 'master' of https://github.com/michifunk/Android-Calendar-App.git
test
AsyncChange und AsyncDelete getestet
Refactored, Error Handling added
Merge remote-tracking branch 'origin/master'

Conflicts:
	calendar-android-sample/src/main/java/com/google/api/services/samples/calendar/android/AsyncAddEvent2.java