Heroku integration with foreman

Add foreman configuration for Heroku:
- To test production configuration execute NODE_ENV=production foreman
  start
- Database connection configuration now handles "use_env_variable" which
  should be defined as a environment variable such as "DATABASE_URL"
  with a proper database URI connection string, ie:
  postgres://user:password@db.example.com:5432/database
- Added package.json configuration to run migrations and db seed after
  `npm install`

Update frontend models to match sequelize definition.
Update views to work according to the changes above.
Handling isCompleted and parentId apropiately for PostgreSQL databases

orm.js

@@ -1,7 +1,26 @@
 var Sequelize = require('sequelize');
 
+/* http://sequelizejs.com/articles/heroku */
+var parseUrl = function(url) {
+    var match = url.match(/([\w]+):\/\/([^:]+):([^@]+)@([^:]+):(\d+)\/(.+)/);
+    db = {
+        database : match[6],
+        username : match[2],
+        password : match[3],
+        options  : {
+            port     : match[5],
+            host     : match[4],
+            dialect  : match[1],
+        }
+    }
+    return db;
+}
+
 module.exports = {
     configure: function(db) {
+        db.url = db.use_env_variable ? process.env[db.use_env_variable] : null;
+        db = db.url ? parseUrl(db.url) : db;
         return new Sequelize(db.database, db.username, db.password, db.options);
     }
 }
+