Update gmail_checker.py

row_data is byte string. It doesn't have decode. Tested on python3
fix arch docs, qtile-git and qtile-python3-git were swapped

Closes #515
Put overvview first

The overview section is listed second in the config section. In every other
section overview is first--becaue overviews should be first.

Closes #516
update for cairocffi on pypi

Closes #517
update debian packaging for cairocffi release