Fixe all non disabled pep8 warnings
remove duplicate import of sleep
pep8 code style
Fixes for various terminal-resize-related regressions

* Checks for drawing of a volume bar didn't take mute button size into account.
* Added checks for whether stuff should be drawn or not agains window w/h.
* Negative win_size() returns were screwing some calculations.
* Re-initialize window on resize (old way of handling terminal resize) - mostly
  because still couldn't get resizeterm to work for some reason.