Updated k-means documentation
Updated k-means documentation

Change-Id: Ie59ecdd3a52f5e8e57ed71d5b1a21b31e7586b80

johnkit/vtk-dev,sankhesh/VTK,mspark93/VTK,biddisco/VTK,hendradarwin/VTK,berendkleinhaneveld/VTK,sankhesh/VTK,spthaolt/VTK,jmerkow/VTK,jmerkow/VTK,candy7393/VTK,SimVascular/VTK,hendradarwin/VTK,hendradarwin/VTK,candy7393/VTK,candy7393/VTK,msmolens/VTK,spthaolt/VTK,mspark93/VTK,ashray/VTK-EVM,spthaolt/VTK,collects/VTK,gram526/VTK,cjh1/VTK,johnkit/vtk-dev,mspark93/VTK,hendradarwin/VTK,sumedhasingla/VTK,berendkleinhaneveld/VTK,johnkit/vtk-dev,biddisco/VTK,keithroe/vtkoptix,spthaolt/VTK,demarle/VTK,keithroe/vtkoptix,candy7393/VTK,johnkit/vtk-dev,mspark93/VTK,biddisco/VTK,johnkit/vtk-dev,berendkleinhaneveld/VTK,sumedhasingla/VTK,ashray/VTK-EVM,gram526/VTK,keithroe/vtkoptix,sumedhasingla/VTK,aashish24/VTK-old,keithroe/vtkoptix,hendradarwin/VTK,cjh1/VTK,candy7393/VTK,sumedhasingla/VTK,aashish24/VTK-old,ashray/VTK-EVM,msmolens/VTK,SimVascular/VTK,berendkleinhaneveld/VTK,gram526/VTK,collects/VTK,sankhesh/VTK,collects/VTK,mspark93/VTK,spthaolt/VTK,ashray/VTK-EVM,johnkit/vtk-dev,collects/VTK,SimVascular/VTK,sumedhasingla/VTK,gram526/VTK,berendkleinhaneveld/VTK,biddisco/VTK,sankhesh/VTK,msmolens/VTK,spthaolt/VTK,keithroe/vtkoptix,collects/VTK,gram526/VTK,ashray/VTK-EVM,demarle/VTK,johnkit/vtk-dev,SimVascular/VTK,demarle/VTK,jmerkow/VTK,keithroe/vtkoptix,gram526/VTK,mspark93/VTK,SimVascular/VTK,cjh1/VTK,biddisco/VTK,ashray/VTK-EVM,sankhesh/VTK,cjh1/VTK,jmerkow/VTK,sumedhasingla/VTK,berendkleinhaneveld/VTK,aashish24/VTK-old,hendradarwin/VTK,gram526/VTK,ashray/VTK-EVM,keithroe/vtkoptix,SimVascular/VTK,msmolens/VTK,demarle/VTK,SimVascular/VTK,aashish24/VTK-old,cjh1/VTK,keithroe/vtkoptix,demarle/VTK,demarle/VTK,ashray/VTK-EVM,spthaolt/VTK,aashish24/VTK-old,aashish24/VTK-old,SimVascular/VTK,msmolens/VTK,cjh1/VTK,biddisco/VTK,sumedhasingla/VTK,demarle/VTK,mspark93/VTK,candy7393/VTK,candy7393/VTK,sankhesh/VTK,jmerkow/VTK,msmolens/VTK,sumedhasingla/VTK,jmerkow/VTK,jmerkow/VTK,biddisco/VTK,jmerkow/VTK,sankhesh/VTK,hendradarwin/VTK,demarle/VTK,berendkleinhaneveld/VTK,candy7393/VTK,msmolens/VTK,mspark93/VTK,gram526/VTK,collects/VTK,sankhesh/VTK,msmolens/VTK