[WIP] New rules

This PR is a Work-in-Progress for the implementation of the new rules systems (which ironically doesn't have the notion of 'rules' anymore).

You can find more information [here](http://onitu.readthedocs.org/en/latest/configuration.html) or in the issue #85.

Progress : 
- [x] Parse the new setup
- [x] Entry -> Service
- [ ] Accept YAML for the setup
- [ ] Update the Plug and the Referee to work with folders
- [ ] Support for updating the folders on the fly
- [ ] Support for adding new drivers on the fly
- [ ] Adapt the tests
- [ ] Write new tests
- [ ] Support conditions in the Referee