Mapping

- µCtrl's model update
- Model can emit events on save and destroy
- Mapping from and to NinjaBlock
- Crawler (fetchAll and pushAll)
- Some tests have been done.
- Need to create tests files with Mocha...
- Steps to fetch all the data : 
- Create an user with the userAccessToken (POST : http://localhost:3000/users). It will retrieve all your infos and give you an µCtrl token.
- Fetch all the data : (GET : http://localhost:3000/users/:µCtrl_Token)
* We'll have to standardize the CRUD events name. (new vs create, remove vs delete, etc)
* `this` in that scope is probably a callback without much context. Might consider passing the actual `condition` object?