Start work with ember data

Broken - problem with ember.js
Add dev ember

Breaks routing, need to update. \o/
Updated dependencies

TODO: Remove dependencies from versionning and use a build tool
Use updated handlebars.
Use new linkTo helper for links.
Updated to new Routing scheme.

Broken, seems to a problem with the model.
Add traces to auth.js
Change import order.
renderTemplates -> renderTemplate
Updated more stuff to new Router scheme.
Work on login.
Updated ember-data.
Fetching now supposedly works.
Work on views.
Update ember.
Updated to new routing scheme.

It FUCKING WORKS !!!!!!
Transitionning back and forth between books works.
Remove configuration for primaryKey.
Users view now works again.
Polishing views.