PEP8 Linting

[kipply]

Ran autopep8 on all the files.

Since some imports are conditional, E402 (where not all imports are at the top of the file) is ignored.

[quozl]

Not reviewed, but a comment; you might also add a .flake8 file;

[flake8]

# E402 module level import not at top of file
# gi.require_version() is required before later imports

ignore = E402

[kipply]

@quozl Thanks! Done, though I added it to the setup.cfg to avoid extra files.