REL Release candidate 0.9.4rc0

[drewejohnson]

This will be the first release candidate for 0.9.4

After this, the develop branch will be used for all development going forward. I don't like having master and develop this far diverged. We don't move so fast between releases that we need the two separate branches

Once this is merged I will make a new tag and release on pypi. Users can then install with pip using either

pip install --pre serpentTools

or this specific version as

pip install serpentTools==0.9.4rc0