change the html layout; add location extraction for PIDs

- show compressed version of request on the list page,
  show all info for the <id> pages
  changes in the templates, the serialization, and init.py
- add 'local handle' link, which resolves to the /registered/ space
- add self.destination as location to PIDs
- redirect on GET /registered/ to PID 'location'

- add demo case to GET a file from /registered/ as CDMI-object