- Added highlight for selected contact.
- Changed communication to be only loaded on change of contact
selection.
- Changed message textbox to be cleared after sending message.
- Fixed missing load of contacts and messages on merge of communication.
- Added manual reload feature. will be removed by server triggered
reloads in the future.
- Implemented AuthenticationView and Activity
- added cache files to gitignore
Merge branch 'master' of https://github.com/muusaebaer/cryptomess.git

Conflicts:
	src/main/java/ch/ffhs/cryptomess/client/activity/MessangerActivity.java
	src/main/java/ch/ffhs/cryptomess/client/ui/messanger/MessangerViewImpl.java
	src/main/java/ch/ffhs/cryptomess/server/dto/CommunicationDTO.java