Add Categories and Groups references
Lazy loaded collection from a set of ids
Fixes criteria on initialization
Remove useless params in autoload
Fix autoload with oro email
Add app/email folder in .gitignore
PIM-2127 : introduce a product pager extension (storage agnostic)

Conflicts:
	src/Pim/Bundle/DataGridBundle/Resources/config/extensions.yml
PIM-2127 : add dummy ODM pager
Add an upgrade file from 1.0 to 1.1
Merge branch 'master' into mongo/grid-pager
PIM-2136 : add MongoDb pager
PIM-2136 : add product pager
PIM-2136 : add specific pager parameter for orm / mongo
PIM-2136 : use product pager extension for product datasource and orm
pager extension for others grids
Merge branch 'master' into midway_odm

Conflicts:
	src/Pim/Bundle/CatalogBundle/Resources/config/storage_driver/doctrine/mongodb-odm.yml
Merge pull request #827 from akeneo/midway_odm

Add Categories and Groups references
PIM-2136 : rename hydrator folders to be consistent with OroGridBundle
PIM-2136 : CS Fix
PIM-2136 : remove useless pager
PIM-2136 : update phpdoc and add exception in methods to implement