Remove /vendor and /cache content
Remove everting about RestBundle
Change user table to "User"
Merge branch 'origin/UserBundle'

Conflicts:
	app/AppKernel.php
	app/config/config.yml
	composer.json
	composer.lock
	src/HGR/EntityBundle/Resources/translations/messages.fr.xlf
	src/HGR/UserBundle/Entity/User.php
Fix different bug after merging UserBundle
Create Empty Core and Backend Bundle for futur development