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.

package.json

@@ -6,6 +6,8 @@
         "express": "~3.1.0",
         "path": "~0.4.9",
         "mysql": "~2.0.0",
+        "sqlite3": "~2.1.0",
+        "sequelize": "~2.0.0",
         "socket.io": "*"
     }
 }