created new Bullet 2 CPU BasicDemo, using the OpenGL 3 rendering. I will add picking soon. Hold ctrl/alt + mouse to move/zoom camera

remove reference to btGImpact (it is removed now)

btgui/OpenGLWindow/SimpleOpenGL3App.h

@@ -16,7 +16,9 @@ struct SimpleOpenGL3App
 	SimpleOpenGL3App(const char* title, int width,int height);
 	virtual ~SimpleOpenGL3App();
 	
-	void drawGrid(int gridSize=10);
+	int	registerCubeShape();
+
+	void drawGrid(int gridSize=10, float yOffset=0.001);
 	void swapBuffer();
 	void drawText( const char* txt, int posX, int posY);