Change properties injection to retrieve from config file
Change AttendeeRepository annotation error.
Merge remote-tracking branch 'origin/master'

Conflicts:
	src/main/java/cn/mobiledaily/domain/mobile/Pusher.java
	src/main/java/cn/mobiledaily/repository/AttendeeRepositoryImpl.java
Update the attendee related features
Add exhibitionRepository
change folder name of push notification key store.
Merge remote-tracking branch 'origin/master'