adding scenegraph nodes

adding volume nodes

updating cmake for ospray

volume now called.  fixing bulid issue with latest devel

updating volume to not crash

removing absolute paths from ospray cmake config

Beware, I live

added to smartvolumemapper

Added GPURayCast tests for OSPRay volume rendering.

updating renderer fb

merge in testing

fixing volume resizing issue

reomving debug output

Added volumePolyData test.

Fixed some tests. OSPray requires vtkProperty (transfer function) to be initialized in 'primitive' geometry objects, otherwise it throws an error.

fixing transfer function crash

Revert "fixing transfer function crash"

This reverts commit 4d07056905b4c8bf48fac4ab21f790e07b97780a.

debugging volume

adding scaling for volumes

Style issues

revert the preserve ospframebuffer commit to restore DMP parallel
revert changed to Common/Core/Testing and Freetype.
revert lingering debugfs
remove #ifOUT code and add exception to multiinclude to for header test
remove commented out code, remove eol space, indented braces for all conditional