added name of light in light export
Light loading in scene graph added
Render queue interface added; Light is used in render;
Camera export fixed
export of perspctive camera do not include ortho scale parameter
frustum class added as a wrapper around FrustumCore
Remove dependency in mouse class from window class
Initial camera interface added and implemented
CAMERATEXT for all types of camera
Camera parsing and scene integration added
up vector added for camera exporter
render processor supports perspective camera