* Clean up all violations reported by pylint in preperation for turning on landscape.io
* fix all prospector errors.
* don't run pylint on pypy/py3 because we're getting all sorts of import errors under Py3 (and it's sorta slow on pypy)
* back to editable? Somehow _cache_ring isn't always being built.
* skip bootstrap.py on landscape.
* pylint fixes for umysql