PEP8 and Flake8 fixes#4613

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adamn wants to merge 3 commits intoencode:masterfrom

Commits on Oct 20, 2016

Update requirements, Python 3.5 error with naked raise
Adam Nelson
committed

Commits on Oct 21, 2016

PEP8 and pyflakes fixes
Adam Nelson
committed
Added serializers. back to serializer classes
Adam Nelson
committed