Merge pull request #501 from n8fr8/master

XMPP fixes and ringtone selection fun!
Merge pull request #502 from n8fr8/master

a few clean-ups before beta 2
iocipher - import
iocipher - prompt to delete original
iocipher - use session name as parent folder
iocipher - delete the session's storage at the end of the session
iocipher - upload/download cleanup
iocipher - strings
iocipher - strings 2
make sure IOCipher is inited in the app create
init but don't mount if password is null
don't show sidebar menu by default
singleTop true to reduce activity recreation
Merge branch 'master' of https://github.com/liorsaar1/ChatSecureAndroid into liorsaar1-master
iocipher - preference 'delete unsecured media' added
make background dark on image viewer
removed debug log leaking file name
fix init issue
Merge branch 'master' of https://github.com/liorsaar1/ChatSecureAndroid into liorsaar1-master
iocipher - export media file from chat