Fix typo in installation.rst

we are not using deps file anymore
Merge branch 'master' of git://github.com/koyaan/SonataTranslationBundle into documentation
Refactor base class to allow user to use gedmo default behavior without personal translations
[Doc] Installation
[Doc] Translate Doctrine ORM models
Add trait to ease user utilisation
[Doc] Add code example for gedmo
[Doc] add config inclusion to plug extension
[Doc] formatting
Merge pull request #6 from sonata-project/documentation

Documentation