* Added DocStrings for methods in Container and Scene.
Removed 2 unused imports from scene.py.
* Added DocStrings for all methods in GraphScene, MovingCameraScene, SceneFileWriter, ThreeDScene, SpecialThreeDScene and ZoomedScene.
* Added DocStrings for all methods in `VectorScene` and LinearTransformationScene...
...except `position_x_coordinate` and `position_y_coordinate`
Co-authored-by: Aathish Sivasubrahmanian <aathishs@Aathishs-MacBook-Air.local>