Run CI for Python 3.6 also

[havocp]

No description provided.

[havocp]

Looks like we need a secretstorage built for 3.6 or something like that.
Could disable a bunch of dependencies here in a pinch since many of them are for unfinished features, but it's sort of a sledgehammer.

[havocp]

python setup.py conda_package is the command that's failing on this branch and needs to be fixed.

RuntimeError: Setuptools downloading is disabled in conda build. Be sure to add all dependencies in the meta.yaml  url=https://pypi.python.org/simple/secretstorage/r
Command failed: /bin/bash -x -e /home/hp/bin/anaconda2/conda-bld/conda.recipe_1487298525126/work/conda_build.sh

[havocp]

Made the keyring dep optional and merged in here, hopefully gets us up and running.