Resolve PEP8 issues

So this PR (which is incredibly boring, so I apologize for that in advance), resolves the majority of the ~500 PEP8 issues in the codebase -- it leaves, as of this commit, 63 linelength flags (the majority of which are in the 80-85 range) which I didn't think were worth resolving (though if you'd like me to I'm more than willing.)