Squashed 'json/' changes from 29e2c7c..83f8e7f

83f8e7f Merge branch 'py3' of github.com:gazpachoking/JSON-Schema-Test-Suite into develop
8b2869d More python 3 compatibility
f4fcb6e Add python 3 compatibility for jsonschema_suite

git-subtree-dir: json
git-subtree-split: 83f8e7f7a68ba02cde3ceb345defceba85f9a3f2
Update test suite.

Merge commit 'e59db4eba9450bee3b17ab11bf52d889da3d1ca5'
requires argparse for suite bin to work.