Move Version entity mapping to a separate mapping file
Move Version to Model namespace
Create a separate VersionRepository for Mongo
Load corresponding mapping for Version
Merge branch 'master' into PIM-2709
Merge branch 'master' into PIM-2709
Improve VersioningBundle compatibility with mongodb
Incomplete attempt at making history grid work with mongo
PIM-2709: Make works sorting
Merge branch 'master' into PIM-2709

Conflicts:
	src/Pim/Bundle/VersioningBundle/Doctrine/MongoDBODM/VersionRepository.php
	src/Pim/Bundle/VersioningBundle/Manager/VersionManager.php
Fix broken ORM compatibility
Fix the author field for mongodb
Fix getting log entries in mongo VersionRepository
Fix cs
Return null in mongo VersionRepository when version is not found
Cast ORM entity ids to string when querying versions stored in mongo
Update changelog
Merge pull request #1224 from akeneo/PIM-2709

PIM-2709 MongoDB storage for versioning