[BUGFIX] Fix adhearsion/adhearsion#270

On FreeSWITCH, only events relating to bridge start/end should be delivered to bridged calls
[BUGFIX] Fix adhearsion/adhearsion#271

A voice value on an audio-only output component should not prevent execution
[BUGFIX] XMPP Ping should be an IQ get, not set
Merge branch 'refs/heads/develop' into feature/new_rayo