PIM-2216 : update formatters
PIM-2216 : fix multiselect formatter, add notes to change log and
upgrade doc
PIM-2216 : move twig property (formatter)
PIM-2216 : add a dedicatd product groups formatter
Fixed FileWriter not callable more than once
Removed debug trace
PIM-2216 : uniformize metric and image properties (formatter)
Merge branch 'master' into mongo/formatters

Conflicts:
	CHANGELOG.md
Corrected test
Merge pull request #886 from akeneo/fix/file_writer

Fix/file writer
Merge branch '1.0'
Fixes product edit form when product without category
Merge branch 'master' of github.com:akeneo/pim-community-dev
Update platform reference
Allow saving a product without scheduling completeness recalculation
Add an affectsCompleteness method to mass edit actions to avoid recalculating completeness when not necessary
Fixes AssociationType reference from Assocation in Mongo
Update changelog
Merge branch 'master' of github.com:akeneo/pim-community-dev
Merge pull request #887 from akeneo/PIM-2152

PIM-2152 Avoid recalculating product completeness when performing mass edit actions that don't change it