Display category assignement in product edit form
Uses category class parameter
Manages category filter and count
Merge branch 'master' into mongodb/categories

Conflicts:
	src/Pim/Bundle/CatalogBundle/Resources/config/repositories.yml
	src/Pim/Bundle/CatalogBundle/Resources/config/storage_driver/doctrine/mongodb-odm.yml
	src/Pim/Bundle/CatalogBundle/Resources/config/storage_driver/doctrine/orm.yml
Remove intermediary classes
Remove unneeded HybridRepository
Move MongoDB Repository to Doctrine/MongoDBODM
Remove obselete service declaration
Merge pull request #884 from akeneo/mongodb/categories

Mongodb/categories support