I added an avtexamples directory and added an example avt program that
opens a file, applies a transform filter, a second transform filter,
and a contour filter and then writes out the result in a silo file.



git-svn-id: http://visit.ilight.com/svn/visit/trunk/src@25255 18c085ea-50e0-402c-830e-de6fd14e8384