Put back media inside the product
Upgrade script to migrate media data in MongoDB
between 1.1 and 1.2
New MediaNormalizer for DirectoToDb writer
CS fixes
Merge branch 'master' into fix/mongo_direct_writer_images

Conflicts:
	CHANGELOG.md
Fixes renaming
MD styles for upgrade doc
MD formatting
Fix typo
Merge branch 'master' into fix/mongo_direct_writer_images
Add events dispatched before and after insert and update
Spec on ProductWriter + adding missing setter in ProductInterface
Merge branch 'master' into fix/mongo_direct_writer_images

Conflicts:
	CHANGELOG.md
Merge pull request #1360 from akeneo/fix/mongo_direct_writer_images

Fix/mongo direct writer images