Remove xmpp specific code from jane_command_worker

[cosgroveb]

Offending code.

In xmpp multi-user-chat messages, the "from" field is a JID in the format: [email protected]/user_alias (XEP-0045 see reflected message stanza in Ex. 61).

We are pulling the "user_alias" off that string in our message records in jane_command_worker:handle_message. This should be handled in jane_xmpp_server.

[benmills]

Good catch. I think we should lump this into issue #7, creating configuration modules.

[cosgroveb]

Probably.

I noticed this awhile back while working on my IRC spike but haven't gotten around to fixing it, just yet. :)