[vtkusers] How to extract nodesets and sidesets for Exodus data

[David Thompson]

Hi Andrew,

> Thanks for the motivation to keep digging, I finally figured it out. My problem was how I was interpreting the indices added to the vtkExtractBlock.
> 
> Just in case anyone else is interested, the following prints out the indices of an Exodus file to use with vtkExtractBlock.

I'm glad you were able to figure it out; and thanks for posting your solution!

	David