Adherence to PEP8 (mostly)

Adherence to PEP8 (only in gae-init specific Python files), checked using `pep8 --ignore=E111,E121 *.py` where the ignores ensure that `pep8` doesn't complain about the 2-spaces convention followed in the project.

Only executed in the root and main folders of the project, for gae-init specific Python files.

In the third commit, I added a `tox.ini` file to default the ignore settings; however, there is no need to actually do so. Once in a while, someone checking PEP8 adherence is more than enough... thus the fourth commit reverts the introduction of a `tox.ini` file.