This is a meta-bundle. It does not contain a Bundle nor a DependencyInjection file. The code is only
ever used by the following bundles:

* DoctrineBundle
* DoctrineMigrationsBundle
* DoctrineMongoDBBundle

Future benefactors:

* DoctrineCouchDBBundle
* DoctrinePHPCRBundle

Additional code that could be put here:

* General Doctrine Form code
* General Doctrine Validator code