ENH: Adding the PineRoot examples.

.gitattributes

src/Cxx.md

src/Cxx/VisualizationAlgorithms/CMakeLists.txt

src/Cxx/VisualizationAlgorithms/PineRootConnectivity.cxx

src/Cxx/VisualizationAlgorithms/PineRootConnectivity.md

src/Cxx/VisualizationAlgorithms/PineRootConnectivityA.cxx

src/Cxx/VisualizationAlgorithms/PineRootDecimation.cxx

src/Cxx/VisualizationAlgorithms/PineRootDecimation.md

src/Python.md

src/Python/VisualizationAlgorithms/PineRootConnectivity.md

src/Python/VisualizationAlgorithms/PineRootConnectivity.py

src/Python/VisualizationAlgorithms/PineRootDecimation.md

src/Python/VisualizationAlgorithms/PineRootDecimation.py