T001 create base bundle structure

Shop\CommonBundle with AbstractController created
Shop\WebSiteBundle with IndexController created 
Please move configuration of this services to related bundle.
In `app/config/config.yml` we use just for configuration of bundles and services/parameters which common for whole project.

Think about bundles as an independent plugins - if you'll move configuration of services to bundle's config you'll can re-use this bundle in next projects