COMP: Use vtkMRMLLabelMapVolumeNode
COMP: Use vtkMRMLLabelMapVolumeNode

A new class for labelmap nodes (vtkMRMLLabelmapNode) was introduced into the Slicer core
that replaces the old method of storing segmentation in a vtkMRMLScalarVolumeNode with
a custom “labelmap” attribute set to "1".
See details here:
http://www.slicer.org/slicerWiki/index.php/Documentation/Labs/Segmentations#vtkMRMLLabelMapVolumeNode_integration

This change in the Slicer core requires modification of your extension. See the suggested change in this commit.

blowekamp/Slicer-IASEM,blowekamp/Slicer-IASEM