Refactor server and lib into separate folders.

Procfile

@@ -1 +1 @@
-web: node app.js
+web: node server/app.js

scripts/start.sh

@@ -1,3 +1,3 @@
 #!/bin/sh
 
-nohup hotnode app.js &
+nohup hotnode server/app.js &

server/app.js

@@ -6,7 +6,7 @@ var express = require('express')
   , exec = require('child_process').exec
   , spawn = require('child_process').spawn
   , Stream = require('stream')
-  , providers = require('./providers.js')
+  , providers = require('../lib/providers.js')
   , redis = require('redis-url').connect()
 
 // Optional modules