fixed port for Heroku

src/app.coffee

@@ -1,8 +1,6 @@
 # Module Dependencies
 
 express = require 'express'
-# routes  = require './routes'
-
 app = module.exports = express.createServer()
 
 
@@ -13,7 +11,6 @@ app.configure ->
   app.register '.coffee', require('coffeekup').adapters.express
   app.use express.bodyParser()
   app.use express.methodOverride()
-  # app.use app.router
   app.use express.static(__dirname + '/public')
 
 app.configure 'development', ->
@@ -30,6 +27,7 @@ app.get '/', (req, res) ->
 
 # Set port and start server.
 app.listen 3000
+app.listen process.env.PORT || 3000
 
 console.log "Express server listening on port %d in %s mode",
   app.address().port, app.settings.env