- "commands" namespace is now registered
- added "do" and "getCommandElt" methods to XEP-0050 to run ad-hoc commands from backend
- commands for a profile are now stored in client._XEP_0050_commands
- Ad-Hoc D-Bus plugin can now be run without lxml or dbus (degraded)
- use MPRIS to control media players
- new adHocRemotesGet bridge method retrieve media players announced in all devices of the profile