fixed #403
rotate avatars

Conflicts:
	src/eu/siacs/conversations/persistance/FileBackend.java
fixed #406
fixed pgp signature creation
more openpgp bug fixes
set openpgp-api-lib to a version that actually works
Merge branch 'master' of github.com:siacs/Conversations

Conflicts:
	src/eu/siacs/conversations/crypto/PgpEngine.java
	src/eu/siacs/conversations/persistance/FileBackend.java
	src/eu/siacs/conversations/ui/ShareWithActivity.java
version bump, changelog and one last minute change for OTR