Fix permission checking in MediaAdminController::show()

The `SHOW` permission does no exist. The correct permission is `VIEW` (and is correctly used in `SonataAdminBundle`).
Merge pull request #428 from dunglas/patch-2

Fix permission checking in MediaAdminController::show()
Support for Symfony 2.2+
Merge pull request #433 from MGaetan89/patch-2

Support for Symfony 2.2+
Form widgets template fixed
Within Pixlr change media route from view to show
Fix bug https://github.com/sonata-project/SonataMediaBundle/issues/430
Merge pull request #438 from interstroom/pixlr-media-show-route

Within Pixlr change media route from view to show
Merge pull request #435 from rodrigodiez/master

Form widgets template fixed
Merge pull request #440 from ibasaw/master

Fix bug https://github.com/sonata-project/SonataMediaBundle/issues/430
Merge pull request #424 from sleavitt/master

Add configuration options for Buzz Browser class, ...
Create SonataMediaBundle.ru.xliff

Russian translation
Merge pull request #442 from alexkhor/patch-1

Create SonataMediaBundle.ru.xliff
Conditionnal edit link on media list
Merge pull request #443 from Wharenn/patch-1

Conditionnal edit link on media list
Fix tests
SONATA-185 - Add sonata_template_box twig node in some templates used in sandbox
Add sonata-project/core-bundle dependency
Add CoreBundle to installation part of documentation
Typo fix in composer.json