[vtkusers] Checking on whether or not a bug in vtkTriangleFilter has been fixed...

[Will Schroeder]

Hi Renny -

The problem boils down to this: the triangulation routine depends on the correct polygon normal
being computed (code outside of the triangulation routine). However, it is not being correctly 
computed on more complex polygons, and if I fix it, it breaks many regression tests. Furthermore, 
there have been recent reports in the literature of very fast triangulation routines which I would like 
to see replace the current routine. I'd guess a week of full time work would do it. If you'd like to make
a go at it, let me know, I can work with you.

Will