Merge pull request #431 from TheMelter/master

Title typo
Merge pull request #432 from TheMelter/master

Fixed grammar.
Update getting-started.rst

Doctrine\Bundle\PHPCRBundle\Initializer\GenericInitializer has two required parameters.
What do you think ?
Merge pull request #433 from benoitMariaux/patch-2

Update getting-started.rst
Merge pull request #434 from TheMelter/master

Fixed mismatching namespace