Use flake8/hacking instead of pep8.

Change-Id: Ia99bc9116d7d8b558002b302cafe354d05d57f72
Add documentation for query parameters

Add documenation for 'marker', 'limit' and 'is_public' query
paramters.

Addresses bug 1177739.

Change-Id: I429ec7a54c132a6eee64846932ff72b35acfbfb2
Merge "Add documentation for query parameters"
Merge "Use flake8/hacking instead of pep8."