Typo in installation.rst

line 253: All access_control settings happens in security.yml so it should be #app/config/security.yml
Fixed russian translation
Merge pull request #482 from Hast/translation/russian

Fixed russian translation
Merge pull request #480 from Soolan/patch-1

Typo in installation.rst
add romanian translation
Merge pull request #484 from xaben/romanian-translation

add romanian translation
Removed Symfony v2.2 from travis
Merge pull request #488 from hason/travis

Removed Symfony v2.2 from travis