typo and layout fixes, tabs and space fixes, cleaned up some other stuff

[bartdorlandt]

Hi Johan,

I noticed some mixes of spaces and tabs and while at it, I've style it a bit more according to pep8, while not trying to mess up your code too much.

I fixed some typos, like log to LOG, where you used it in capital, and somewhere else where it was log.nfo to log.info. Rewritten a few code line, from "if value == False", to "if not value". commented some unused imports and things like that.

[jheling]

Thank you for the cleanup. There are still much things I can learn about python