Support using globs for selecting all resources in a nested container

[phochste]

As an added feature it would be nice to have a container structure like:

container/
     nested/
         deeper/
             bla$.ttl
          nested$.ttl
     foo$.ttl
     bar$.ttl

And use a gitignore style glob pattern to select all nested resources for a selector:

 derived:selector <container/**/*>;