Add doctrine/doctrine-bundle as dependency.

The `DoctrineOrmMappingPass` are only available `>=1.3.0` (currently available as `1.3.x-dev`/`dev-master`). This bundles take use of them, so they should declare `~1.3` as a dependency.

Also it's needed to change the root `composer.json` to `~1.3@dev` or `/1.3.*@dev` match the new branch alias doctrine/DoctrineBundle#253, @stloyd said he will do this (ref #930)