* Add configuration system and default public channels support
* Add support for multiple channels and DM threads with users,
with unread badge indicators. DMs rearrange themselves by
most recently updated on top.
* Responsive CSS to work well on mobile devices.
* WebRTC pees exchange local/remote descriptions ("offer" and "answer")
* They don't seem to exchange ICE candidates yet
* Some back and forth happens but the final WebRTC stream connection
isn't established yet.
