Send "failed to join" message on MUC join error of any kind

Fix room leaving

Better part message

Pick a random conference server

Basic room creation

Initial help

Welcome new users

Whisper by room nick and show errors

Use tel or tel+nick when we can, instead of JID

remove more debug stuff

Better number lookup

Use complete phone number as JID

Invite to room by phone number

Whisper to a phone number without full JID

Send whisper

stitch together long messages

Enable setting nickname

Keep up-to-date on room config

Outbound invites

Random delay