A port of a new Mayavi application and libraries for scientific 3D visualization
with 4 depend ports.
All 5 ports are in Bugzilla: bug 204430 devel/py-envisage, bug 204431 devel/py-apptools,
bug 204432 devel/py-pyface, bug 204433 graphics/py-traitsui,
and bug 204435 graphics/py-mayavi.
The port devel/py-envisage in bug 204430 has been commited while this review was
under preparation. There is at least one minor change to it in this review.