Added unique constraint
Merge branch 'master' into fix/option_value_constraint
Merge branch 'master' into fix/option_value_constraint
PIM-2754: Introduction of the datagrid support resolver
PIM-2754: Migrating datasource types constants into a dedicated class
PIM-2754: fix typos
Merge pull request #1259 from akeneo/PIM-2754

PIM-2754: Introduction of the datagrid support resolver
PIM-2754 : add missing use statement
Fix retrieving versions for proxies
Merge pull request #1208 from akeneo/fix/option_value_constraint

Added unique constraint on option translations
Merge pull request #1260 from akeneo/versioning-proxy-fix

Fix retrieving versions for proxies
Watch prepended bundle config file for modification
Prevent serialization of job objects

https://github.com/symfony/symfony/commit/73d56f7a1a7e2aaf7cb00230af25ca208330ce6d

Job object serialization fails for unexpected reason (serialize() must
return NULL or string), I suspect one of the object descendant's
serialize method to be badly implemented. Sadly this is hardly
debuggable as the serialization tree is quite huge (more than 200 levels
of recursivity).
PIM-2869 : use new platform tag
Merge pull request #1261 from akeneo/bugfix/sf-2.3.18

[Upgrade to SF2.3.18] Prevent serialization of job objects
PIM-2770 : rename a group repository method and a translation message to
make the control more understandable
PIM-2754 : fix CS
Improve file and image input display when disabled
Fix PHPCS and PMD
Introduced a product value key generator