PIM-3238: Create family interface
PIM-3238: Use FamilyInterface in mapping
PIM-3238: Update UPGRADE-1.3.me file
PIM-3238: Fix family interface for mongodb
PIM-3238: Use family interface instead of concrete class
Merge pull request #1627 from akeneo/family_interface

PIM-3238: introduce family interface
PIM-3260 : first draft of products updater api
PIM-3260 : add an example with locale and scope
PIM-3260 : add a first copier POC