Disable Python 3 travis build for now (root_numpy not Python 3 compatible yet)
Disable Python 3 travis build for now (root_numpy not Python 3 compatible yet)

scikit-hep/root_numpy,ndawe/root_numpy,scikit-hep/root_numpy,ibab/root_numpy,scikit-hep/root_numpy,ibab/root_numpy,ndawe/root_numpy,scikit-hep/root_numpy,ndawe/root_numpy,ibab/root_numpy,rootpy/root_numpy,rootpy/root_numpy,rootpy/root_numpy,ibab/root_numpy,rootpy/root_numpy,ndawe/root_numpy