CAL-143 implement activity type
CAL-143 fix update occurrence event and broadcast event
CAL-197 merge activity-type with master
CAL-200 update activity id when re-create activity
CAL-200 [Activity type] 1 comment for multi changes, other requirements
CAL-200 fix unit test fails
CAL-200 [Activity type] fix bugs create new event after dragndrop
Merge branch 'master' into feature/activity-type
CAL-200 [Activity type] update activity when editing repetitive events
CAL-237 open popup detail clicking the task/event summary
Merge branch 'master' into feature/activity-type
Merge branch 'master' into feature/activity-type
Merge branch 'master' into feature/activity-type
Merge branch 'master' into feature/activity-type
CAL-294 deleting all instances of a repetitive event does not delete its exception events
CAL-294 revert change of ical4j version
CAL-342 fix calendar activity for repetitive events
merge with origin/feature/activity-type
Merge branch 'master' into feature/activity-type
Merge branch 'master' into feature/activity-type (after 4.0.0-Beta1 release)