Fixed issue #6 - Added /notfound page.

Also removed some debugging logging code and refactored some stuff to be
less verbose.
Added IRC announcing. Doesn't quite work...

Need to fix the "post /irc" method so it actually requests the specified URL.
Added IRC Announce as per issue #4.

If configured, an Announce via IRC option is presented on the new mosh view.
If one of these options are checked, a GET is done to the specified URL with the
params "channel" and "message", when the channel is that which was checked, and
the message is the one specified in the config with values interpolated.

Also changed the ID schema to a SHA1 Hex, similar to that of GH, rather than a
UUID which is longer than a Donkey's cock.
Ensure that the POST route can't be misused if no IRC config is set.