Changes required to match upstream Netty.
Adding XMPP diffsync
Initial client XMPP work
Client will send message in an explicit message param
Initial "it compiles" commit
Horrible hacking to get code working with Xmpp sync
Moving to aar packaging
Fixing message handling bugs
untangling google's registration id and diff syncs client id
Swallowing errors during broadcasting
Fixing errors serializing edits
Hacking on the client
Edits now always contain document info