+ Internal improvements for collision shapes

1) add AabbCaching versions of btPolyhedralConvexShape and btMultiSphereShape (this speeds up btMultiSphereShape 'getAabb', and reduces size of btBoxShape)
2) btCylinderShape doesn't derive from btBoxShape anymore
+ Minor fixes in drawing for btMultiSphereShape, btBoxShape.
+ Don't re-generate btDebugFont every frame
+ Disabled velocity prediction for btDbvtBroadphase. Previous default can be restored using btDbvtBroadphase->setVelocityPrediction(1./2.);

src/BulletCollision/CollisionShapes/btConvexPointCloudShape.h

@@ -21,7 +21,7 @@ subject to the following restrictions:
 #include "LinearMath/btAlignedObjectArray.h"
 
 ///The btConvexPointCloudShape implements an implicit convex hull of an array of vertices.
-ATTRIBUTE_ALIGNED16(class) btConvexPointCloudShape : public btPolyhedralConvexShape
+ATTRIBUTE_ALIGNED16(class) btConvexPointCloudShape : public btPolyhedralConvexAabbCachingShape
 {
 	btVector3* m_unscaledPoints;
 	int m_numPoints;