ENH: Simplify node loading methods API in slicer.util #1159
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Previously, returnNode=True argument had to be set to retrieve the loaded node:
volumeNode = slicer.util.loadVolume('path/to/volume.nrrd', returnNode=True)[1]
Now the node is returned by default:
volumeNode = slicer.util.loadVolume('path/to/volume.nrrd')
Also added loadNodesFromFile function that can return multiple loaded nodes.