pycharm fixing
pycharm: print ... -> print(...)
pycharm: a = a + b -> a += b
pycharm: simplify boolean check
pycharm: a != None -> a is not None
pycharm: style
pycharm: default argument mutable
pycharm: style
pycharm: new style class
pycharm: add utf8 encoding where missing
pycharm: more sleeping bugs fixed
pycharm: improve imports + other smaller changes
pycharm: large code beautification

Spacing and co should now be PEP8 conformant
Preparing for 0.13