HUGE reorg to look more like Adam's project organization
 - On localhost:3000/public: serves up public/index.jade, which includes
   layout.jade. It serves this because of the harp.mount and
   express.static (should prob be more specific about this)

 - Next, need to setup API calls to mongo. also steal Adam's code via
   api.coffee. Can add require('./routes') to copy his route organization

 - Need to get 'watch' command set up