pylint pragmas: 'disable-msg' => 'disable'

Assuming that I have indeed gotten everything else pushed, this will probably be my last commit for quite a while.

@thatch45: I think this last batch of commits should bring the number of pylint messages (at least for non-trivial / higher-priority stuff, in contrast to e.g. "line too long") down to a level that's fairly feasible for y'all to investigate and/or track (Jenkins instance maybe?). In particular, I'd advise looking at the outstanding `W0613` (unused argument) warnings, since I've discovered several bugs that way. To a lesser extent, `W0631` (Using possibly undefined loop variable) might be pointing out a few edge case bugs.