test
Merged 'dev'.
moep
Merged 'dev'.
moep
Merged 'dev'.
Merged 'dev'.
Merged 'dev'.
zs
Merged 'dev'.
update call handling
add app event,if subscribtion id will change,  conversation, contacts and friendrequests will be updated
Merged 'dev'.
Merged 'dev'.
update api provider, fix change subscribtionId on the fly
Merged 'dev'.
Merged 'dev'.
add tests to check get a new subscription id, when the backend returns a new one
Finish event-subscribtion