Auto route integration

This PR integrates the `auto-route-bundle` with the Blog.

Posts and Blogs are now routed automatically, the configuration is included from the sandbox `config,yml` using "import".

I have removed the BlogRouteManager, which breaks the Tag routing. Tags are not PHPCR documents and so cannot be handled with the AutoRouteBundle yet. Any idegas?

1. Maybe the AutoRouteBundle should support appending routes, e.g.  The Blog route should always have a child "tag" with the pattern "{tag_name}".
2. Tags should be persisted as PHPCR documents and handled in that way.