PIM-3185 #comment remove the fixed mysql socket location
PIM-3185 #comment CHANGELOG update
Merge pull request #1504 from akeneo/PIM-3185

Pim 3185
Complete UPGRADE.md with the default user group All
Merge pull request #1505 from akeneo/fix/upgrade

Complete UPGRADE.md with the default user group All
[CrowdIn] Updated translations
Merge pull request #1522 from nono-akeneo/crowdin/master-2014-09-11-10-53

Update translations from CrowdIn
Add default locales for javascript translations
Update instructions for language pack installation
Update CONTRIBUTING.md
Merge branch 'master' into refactor/product_query_builder