Flake8

I thought we could need a nicely defined style guide for this project, and I nominate Flake8. This pull request changes the current python code in the project to conform to Flake8 standards.

Read more about Flake8 here: http://flake8.readthedocs.org/en/2.0/

Flake8 has decent editor plugin support. I use https://github.com/nvie/vim-flake8 for Vim, and https://github.com/dreadatour/Flake8Lint is supposed to be good for Sublime.