Decode results before loading json.

[pagreene]

This is a simple but effective (in the cases I have tested) method to allow python 3.5-3.6 compatibility, a la #158.

[kellrott]

@adamstruck which python versions is our travis build testing against?

[adamstruck]

@kellrott we are testing against whatever version of python Travis is providing. We definitely need to improve our testing around the python / javascript based clients.

[pagreene]

You can specify both/either/any version of python in the travis yaml. For https://github.com/sorgerlab/indra, for example, we test on both 2.7 and 3.5.

[adamstruck]

Thanks for the contribution @pagreene

@kellrott writing unit tests for the python gripql and creating a testing matrix of python versions can be tracked in #160