Add doctrine/doctrine-bundle as dependency.

The orm mappings pass are only available `>=1.3.0` (currently tagged as defect beta and working dev). 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@de` or `/1.3.*@dev` match the new branch alias doctrine/DoctrineBundle#253, @stloyd said he will do this (ref #930)