ENH: Add WandEffect to segmentation editor

This tool was a demonstration for creating an editor extension, but
some users found it to be a valuable addition, so Andras suggested
adding it to the core of slicer.  This version exposes additional options,
such as segmenting in 3D and also using a fixed threshold for better
precision when segmenting.

git-svn-id: http://svn.slicer.org/Slicer4/trunk@21823 3bd1e089-480b-0410-8dfb-8563597acbee
ENH: enable the editor cursor for the wand effect

git-svn-id: http://svn.slicer.org/Slicer4/trunk@21824 3bd1e089-480b-0410-8dfb-8563597acbee
COMP: include dicom query/retrieve testing tool in slicer package

The DICOM Query/Retrieve Service Class Provider (dcmqrscp in dcmtk talk)
is useful for testing dicom networking in a controlled environment.

git-svn-id: http://svn.slicer.org/Slicer4/trunk@21825 3bd1e089-480b-0410-8dfb-8563597acbee
BUG: Fixed crash on save mrml due to incorrect vtkMRMLDisplayableNode::DisplayModifiedEvent


git-svn-id: http://svn.slicer.org/Slicer4/trunk@21826 3bd1e089-480b-0410-8dfb-8563597acbee
STYLE: change category of Performance Tests per developer discussion

Now is Testing not Developer Tools.

git-svn-id: http://svn.slicer.org/Slicer4/trunk@21827 3bd1e089-480b-0410-8dfb-8563597acbee
ENH: Improve efficiency of PaintOver mode in WandEffect of Editor

Use a numpy array of booleans to store the visit status for
faster lookup.
Thanks to Andras for the contribution!

git-svn-id: http://svn.slicer.org/Slicer4/trunk@21828 3bd1e089-480b-0410-8dfb-8563597acbee