make sure aligned structures/classes use the btAlignedAlloc/btAlignedFree, by overriding the operator new/delete for that struct/class.

integrated some contributions from IBM Germany for libspe2

src/BulletCollision/NarrowPhaseCollision/btPersistentManifold.h

@@ -20,6 +20,7 @@ subject to the following restrictions:
 #include "LinearMath/btVector3.h"
 #include "LinearMath/btTransform.h"
 #include "btManifoldPoint.h"
+#include "LinearMath/btAlignedAllocator.h"
 
 struct btCollisionResult;
 
@@ -55,6 +56,8 @@ ATTRIBUTE_ALIGNED16( class) btPersistentManifold
 
 public:
 
+	BT_DECLARE_ALIGNED_ALLOCATOR();
+
 	int m_index1;
 
 	btPersistentManifold();