added non-uniform scaling to btMultiSphereShape

added ray-aabb check
modified Raycast demo to be more useful for debugging collision shapes

Demos/OpenGL/GLDebugDrawer.h

@@ -13,6 +13,8 @@ public:
 
 	GLDebugDrawer();
 
+	void drawAabb(const btVector3& from,const btVector3& to,const btVector3& color);
+
 	virtual void	drawLine(const btVector3& from,const btVector3& to,const btVector3& color);
 
 	virtual void	drawContactPoint(const btVector3& PointOnB,const btVector3& normalOnB,float distance,int lifeTime,const btVector3& color);