adding start of progressive rendering updates.
infrastructure to pass volumetric elements to renderers as tetrahedra.
Updated eavlXGCParticle importer to work with staged files.
Merge branch 'master' of https://github.com/jsmeredith/EAVL
Fixed eavlab compilation error in eavlSceneRenderer. Added support for moving the camera in the view direction.
adding a few matrix math helper functions.
adding simple volume renderer
Merge branch 'master' of github.com:jsmeredith/EAVL
adding missing include directive
big speedups for naive volume renderer
reverting accidental enabling of openmp in poor spot
code cleanup and add some caching
fixing color table with raw opengl renderer.
fixing mismatch new/delete and making various dtors virtual.
Updated configre file to be nicer to/with ADIOS, cosmetic changes to XGCParticleImporter.
adding config site for new desktop
adios_config was not working correctly. Roll back to the old way...
Merge remote-tracking branch 'github/master' into master_cmake

Conflicts:
	src/rendering/eavlSceneRendererSimpleRT.h