pep8 compliance fixes

Signed-off-by: Michael McCracken <mike.mccracken@canonical.com>
More linelength tweaks, mostly to avoid .format(... at the beginning of a line

Signed-off-by: Michael McCracken <mike.mccracken@canonical.com>
update docstring with correct type info
Merge pull request #24 from mikemccracken/pep8-fixes

pep8 compliance fixes