[FEATURE] Routing for Products on Website

Merge #6 and https://github.com/sulu-cmf/SuluWebsiteBundle/pull/31 before that one

__Tasks:__

- [ ] test coverage
- [ ] gather feedback for my changes

__Informations:__

| Q             | A
| ------------- | ---
| Tests pass?   | yes
| Fixed tickets | none
| BC Breaks     | none
| Doc           | none