Code review comment for lp:~jml/gtg/docstrings-for-requester

This changes all of the comments in the requester module into docstrings. It also removes any trailing whitespace, removes any unnecessary backslashes, deletes spaces before colons (PEP 8 violation), adds spaces after commas (PEP 8 violation), puts spaces after the '#' symbol on comments, fixes spelling on comments and tries to expand the docstrings where appropriate.