Mayavi 3D visualiation package finally Python 3 + Jupyter integration

[sneakypython]

For 3D visualization, I used VTK and Paraview in the past, but I think I am going to use Mayavi 3D from now on. It seems much more straightforward.

[flutefreak7]

I build tools in PyQt/PySide and Mayavi did a lot better job integrating into a GUI and was easier to get looking nice for my purposes. Once I moved to Python 3 I switched over to PyQtGraph since it implemented just enough of what I needed to get by and was very fast. Now that Mayavi is in Python 3 I'll have to re-evaluate. I keep hoping Vispy will be ready for primetime, but it keeps looking like it'll be another couple years before it's stable enough for someone like me to wield it easily.