WIP: Validate form errors.

#9 

* added angularJs validate.
* Added bootstrap theme

![add content daf](https://cloud.githubusercontent.com/assets/7369740/3869320/92900a88-208a-11e4-8dd3-9fb5b709b076.png)


You can remove header and config because not it's used.

Also the $log in the controller definition.
https://github.com/nader77/drupal_angular_forms/blob/e7162f4101ca3e7d2dbee1a2987a393236f46cc3/components/restful-app/src/controllers/main.js#L4