Send MOTD on connect
Remove auto-joining of all channels

Allow the user to pick the channels they want to join from the list.
Also, implement WHO and fix list_nicks to make Pidgin happy.
Use pretty channel names

This still needs some work to deal with conversation name changes. The
server needs to mirror events to all channels the user has joined that
contain the matching conversation ID hash.
Update README.md
Merge pull request #1 from tdryer/master

Pretty channel names, no auto-joining, fix Pidgin