[WIP] Two fixes related to making PHPCR-ODM work

- Changed requirements on routes to use .* to allow full paths
- Use ->find($id) instead of ->findBy(array('id' => $id)) which would
  never work with PHPCR-ODM

Relates to PR on core bundle: https://github.com/sonata-project/SonataCoreBundle/pull/82
that is just the default we recommend, right? why not parent? repository could be useful if you need customization, but you don't necessarily need that, do you?