ENH: Use MarkupsFiducial node for POINT messages
STYLE: Rename vtkIGTLToMRMLPointMetaList to vtkIGTLToMRMLPoint
STYLE: Rename vtkIGTLToMRMLPoint to vtkIGTLToMRMLPoints.
Merge pull request #44 from tokjun/3875-convert-point-message-to-markups-node

3875 convert point message to markups node