Updates for RajawaliScene
Reenabled the scene demo.

Signed-off-by: Jared Woolston <jwoolston@tenkiv.com>
Added scene demo.

Signed-off-by: Jared Woolston <jwoolston@tenkiv.com>
Added documentation.
Merge pull request #22 from Tenkiv/rajawali_scene

Rajawali scene