Merge topic 'reslice-mapper-faster'
158d5346 ENH: Add timestamp check on quality adjustment. 118cf7e4 ENH: Consolidate ResliceMapper OpenGL code into SliceMapper. a8976cc0 BUG: Need to propagate AllocatedRenderTime to children.
158d5346 ENH: Add timestamp check on quality adjustment. 118cf7e4 ENH: Consolidate ResliceMapper OpenGL code into SliceMapper. a8976cc0 BUG: Need to propagate AllocatedRenderTime to children.