As normal map material now handles fog, it has to be enabled explicitly.

Corresponding keys:
 - R up
 - F down

Added Matrix4 type to uniforms. Fixed Texture cloning. Fixed uniforms cloning for Vector2, Vector4 and arrays.

Added path.createSpacedPointsGeometry() and extended shapes example to show such equidistantly sampled paths.

Spaced points are magic that will eventually make objects follow paths with constant speed.

This is a more proper way how to generate visual lines / vertices (all elements use single geometry).

Also extended shapes example to show how to use this with Line and ParticleSystem.

(per Qt API design suggestions http://developer.qt.nokia.com/wiki/API_Design_Principles)

Also some more whitespace cleanup.

Also cleaned up ExtrudeGeometry.

Renamed StraightCurve => LineCurve.
Some white space and comments cleanup.