Bump version to 0.3.0; Switch back to node-icecast master; Add Roadmap

* node-icecast: Switch back to non-forked node-icecast, changing up how we do
  our different initial metaint using method suggested by TooTallNate
  -- https://github.com/TooTallNate/node-icecast/pull/10
* Bump to 0.3.0
* Add ROADMAP laying out big themes for versions between here and 1.0