Issue 211 travis

closes #211

I accidentally added the build logo to the develop branch instead if this one, sorry!

Nose isn't running coverage.  I think it's because it's using the system nosetests instead of the one updated in the virtual environment, but I haven't figured it out yet.  See #213
Why does this script have to be different from the create_oncotator_venv.sh?  Can we just parameter-ize the differences?