Port shared code information from the wiki

Port shared code information from the wiki

Since the shared code now has special status with respect to
copyrights, port them into a more structured format in the source tree
and add a python function that parses and returns a dictionary with
the information.

I need this to exclude these files from the Contributed-by changes and
I reckon it would be useful to know these files for future tooling.

Reviewed-by: Carlos O'Donell <carlos@redhat.com>