• Volume rendering now integrated into the "scivis" renderer
• Volumes are rendered in the same way the "dvr" volume renderer
  renders them
• Ambient occlusion works with implicit isosurfaces, with a known
  visual quality/performance trade-off
• Intel® Xeon Phi™ (codename Knights Corner) COI device and build
  infrastructure restored (volume rendering is known to still be
  broken)
• New support for CPack built OSPRay binary redistributable packages
• Add support for HDRI lighting in path tracer
• Add ospRemoveVolume() API call
• Add ability to render a subsection of the full view into the entire
  framebuffer in the perspective camera
• Many miscellaneous cleanups, bugfixes, and improvements:
• The depthbuffer is now correctly populated by in the "scivis"
  renderer
• Updated default renderer to be "ao1" in ospModelViewer
• Trianglemesh postIntersect shading is now 64-bit safe
• Texture2D has been reworked, with many improvements and bug fixes
• Fixed bug where MPI device would freeze while rendering frames
  with TBB
• Updates to CMake with better error messages when TBB is missing