[WIP] removed reatchet lib

fixed dependencies, moved ratchet to content-bundle:

merge this after: https://github.com/sulu-cmf/SuluContentBundle/pull/24

- [ ] finish the code
- [ ] gather feedback for my changes


| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| Tests pass?   | [yes|no|none]
| Fixed tickets | none
| Doc           | none