Added Dodecahedron, ReadSLC, RuledSurfaceFilter

src/Python/IO/ReadSLC.md

src/PythonicAPI.md

src/PythonicAPI/GeometricObjects/Dodecahedron.py

src/PythonicAPI/IO/ReadSLC.md

src/PythonicAPI/IO/ReadSLC.py

src/PythonicAPI/PolyData/RuledSurfaceFilter.py

src/PythonicAPI/Snippets/VTKDataClasses.md

...aseline/PythonicAPI/GeometricObjects/TestDodecahedron.png

src/Testing/Baseline/PythonicAPI/IO/TestReadSLC.png

.../Baseline/PythonicAPI/PolyData/TestRuledSurfaceFilter.png