"Finalize" chat UI
GCM skeleton
Merge branch 'master' of https://github.com/tvbarthel/Mobidevland

Conflicts:
	CFDM_Mobidevland/build.gradle
	CFDM_Mobidevland/src/main/AndroidManifest.xml
	CFDM_Mobidevland/src/main/java/fr/tvbarthel/cfdm/mobidevland/MainActivity.java
Add Chat navigation