finished issues #9 and #11
disabled proguard
implemented enhancement #19
implemented enhancements #18 and #22
changed layout in about_fragment.xml
implemented enhancement #20
made some modifications on the DashClockExtensionService.java
implemented okhttp for the server requests (#4). Also reenabled proguard (#16) and updated some libraries
made huge improvements regarding issue #27, but it isn't solved completely yet.
switched to using android studio and gradle
restructured the app, so it is usable with gradle and android studio
changed structure of app
Merge remote-tracking branch 'remotes/origin/version_1_3'

Conflicts:
	app/src/main/AndroidManifest.xml