free memory for btShapeHulls, keep track of it in GL_ShapeDrawer.

move btShapeHull and btConvexHull into its own library in Extras/ConvexHull (it allocates memory using mem/delete and refactoring into using btAlignedAlloc/Free takes too much time)
fix heightfield / btOptimizedBvh for quantization, so that raycast can use quantized aabb (clamp up for maxima and down for minima)

work-in-progress (update projectfiles etc)

Demos/OpenGL/DemoApplication.h

@@ -18,6 +18,7 @@ subject to the following restrictions:
 
 
 #include "GlutStuff.h"
+#include "GL_ShapeDrawer.h"
 
 #include <stdlib.h>
 #include <stdio.h>
@@ -37,7 +38,6 @@ class	btTypedConstraint;
 
 
 
-
 class DemoApplication
 {
 	void	displayProfileString(int xOffset,int yStart,char* message);
@@ -81,6 +81,7 @@ class DemoApplication
 
 	void showProfileInfo(float& xOffset,float& yStart, float yIncr);
 
+	GL_ShapeDrawer	m_shapeDrawer;
 
 public: