Update setup.py to 0.2.0b12
Update setup.py to 0.2.0b12

BruceSherwood/vpython-jupyter,mwcraig/vpython-jupyter,sspickle/vpython-jupyter,BruceSherwood/vpython-jupyter,BruceSherwood/vpython-jupyter,mwcraig/vpython-jupyter,mwcraig/vpython-jupyter,mwcraig/vpython-jupyter,BruceSherwood/vpython-jupyter,sspickle/vpython-jupyter