Initial Sequelize integration.

Added orm module to abstract Sequelize usage to some degree. ORM module
handles the configuration and instantiation of Sequelize. Models are
defined and instantiated from models/*

Tested only against SQLite.

Faily new to nodejs so I probably messed up with something.

models/task.js

@@ -0,0 +1,14 @@
+var Sequelize = require('sequelize');
+
+module.exports = {
+    instance: function(orm) {
+        task = orm.define('Tasks', {
+            content: Sequelize.STRING,
+            parent: Sequelize.INTEGER,
+            is_completed: Sequelize.BOOLEAN
+        });
+
+        orm.sync();
+        return task;
+    }
+}