Small changes to accommodate the new material manager.
Updated the examples to reflect the new object color functionality (see https://github.com/MasDennis/Rajawali/commit/f848272f7d82642e4c439e3e197a7dcfc227f1a2)
Updated examples
Updated examples after geometry optimisation push (https://github.com/MasDennis/Rajawali/commit/0baa47fdc29fa6670a8a3560099e231d57a15580)
Also added a new colored line segments example and refactored a bit.
Added an orthographic camera example and did further refactoring and grouping.
Added a new camera animation example. Using a catmull rom spline as its path.
Added an animated GIF texture example.
Did some more refactoring.
ScreenQuad / Camera2D update. Removed the explicit addition of a Camera2D to the scene.
New Camera VideoTexture example. Not fully working yet.
Added point light, directional light and spot light examples.
MD2 animation demo cleanup. Code was included twice.