- Added option to use the mapper's feature LockSampleDistanceToInputSpacing to calculate it internally instead of setting sampling distance manually. On by default. Only applies to GPU rendering in adaptive mode.
- Added UseJittering option to GPU display node and the UI in advanced rendering properties (called Surface smoothing). If turned on, then uses random noise to remove the wood-grain artifact. Off by default.
- Widened range of FPS slider for adaptive mode to accommodate for new virtual reality use cases (maximum used to be 20, now it is 100)
- Removed empty "Misc" tab from Volume rendering module UI
- Fixed ctkDoubleSlider related warning message
- Modernized vtkMRMLVolumeRenderingDisplayNode to use node references and new property macros. This fixed several bugs as well (e.g. not reading/writing attributes). Removed the related test step from vtkMRMLVolumePropertyNodeTest1

git-svn-id: http://svn.slicer.org/Slicer4/trunk@27072 3bd1e089-480b-0410-8dfb-8563597acbee