Apple contribution for OSX SSE and iOS NEON optimizations unit tests, thanks to Jordan Hubbard, Ian Ollmann and Hristo Hristov.

For OSX:
cd build
./premake_osx xcode4
for iOS:
cd build
./ios_build.sh
./ios_run.sh

Also integrated the branches/StackAllocation to make it easier to multi-thread collision detection in the near future. It avoids changing the btCollisionObject while performing collision detection.

As this is a large patch, some stuff might be temporarily broken, I'll keep an eye out on issues.

src/BulletCollision/CollisionShapes/btPolyhedralConvexShape.h

@@ -22,7 +22,7 @@ class btConvexPolyhedron;
 
 
 ///The btPolyhedralConvexShape is an internal interface class for polyhedral convex shapes.
-class btPolyhedralConvexShape : public btConvexInternalShape
+ATTRIBUTE_ALIGNED16(class) btPolyhedralConvexShape : public btConvexInternalShape
 {
 	
 
@@ -31,6 +31,9 @@ protected:
 	btConvexPolyhedron* m_polyhedron;
 
 public:
+	
+	BT_DECLARE_ALIGNED_ALLOCATOR();
+	
 
 	btPolyhedralConvexShape();