Fix a bug in the scene editor where the collision shape was not being updated correctly when a node was refreshed.
Small reorganisation.
Cleanup.
Add the ability to add components to scene nodes in the scene editor.
Add the ability to control the angles of a spot light in the editor.
Add support for setting the materials of a model component in the scene editor.
Cleanup.
Reorganisation.
Add support for running a physics simulation of a scene in the editor.