Adding PlateVibration.

src/Cxx.md

src/Cxx/VisualizationAlgorithms/CMakeLists.txt

src/Cxx/VisualizationAlgorithms/PlateVibration.cxx

src/Cxx/VisualizationAlgorithms/PlateVibration.md

src/Instructions/ForDevelopers.md

src/Python.md

src/Python/VisualizationAlgorithms/PlateVibration.md

src/Python/VisualizationAlgorithms/PlateVibration.py