ENH: Add itk.Point wrapping for dimension 6
ENH: Add itk.Point wrapping for dimension 6

Needed for RANSAC where two corresponding 3D points will be passed
as one entry (concatenation) to ITK Ransac.

hjmjohnson/ITK,BRAINSia/ITK,BRAINSia/ITK,Kitware/ITK,thewtex/ITK,thewtex/ITK,thewtex/ITK,richardbeare/ITK,thewtex/ITK,InsightSoftwareConsortium/ITK,Kitware/ITK,thewtex/ITK,richardbeare/ITK,Kitware/ITK,BRAINSia/ITK,richardbeare/ITK,BRAINSia/ITK,Kitware/ITK,hjmjohnson/ITK,hjmjohnson/ITK,richardbeare/ITK,Kitware/ITK,richardbeare/ITK,InsightSoftwareConsortium/ITK,BRAINSia/ITK,InsightSoftwareConsortium/ITK,BRAINSia/ITK,Kitware/ITK,InsightSoftwareConsortium/ITK,hjmjohnson/ITK,InsightSoftwareConsortium/ITK,thewtex/ITK,InsightSoftwareConsortium/ITK,richardbeare/ITK,hjmjohnson/ITK,hjmjohnson/ITK,Kitware/ITK,hjmjohnson/ITK,richardbeare/ITK,BRAINSia/ITK,InsightSoftwareConsortium/ITK,thewtex/ITK