Added Lorenz, MotionBlur, WriteSTL, SplineWidget, SphereWidget

src/PythonicAPI.md

src/PythonicAPI/IO/ReadSLC.py

src/PythonicAPI/IO/WriteSTL.md

src/PythonicAPI/IO/WriteSTL.py

src/PythonicAPI/Rendering/MotionBlur.md

src/PythonicAPI/Rendering/MotionBlur.py

src/PythonicAPI/Snippets/VTKDataClasses.md

src/PythonicAPI/Visualization/FroggieView.py

src/PythonicAPI/Visualization/Lorenz.py

src/PythonicAPI/Widgets/SphereWidget.md

src/PythonicAPI/Widgets/SphereWidget.py

src/PythonicAPI/Widgets/SplineWidget.md

src/PythonicAPI/Widgets/SplineWidget.py

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

...Testing/Baseline/PythonicAPI/Rendering/TestMotionBlur.png

...Testing/Baseline/PythonicAPI/Visualization/TestLorenz.png

...Testing/Baseline/PythonicAPI/Widgets/TestSphereWidget.png

...Testing/Baseline/PythonicAPI/Widgets/TestSplineWidget.png