add the 'extras' and Bullet 2 tests, to make it easier to create a new intermediate release

Extras/Serialize/makesdna/DNA_rigidbody.h

@@ -0,0 +1,29 @@
+
+#ifndef DNA_RIGIDBODY_H
+#define DNA_RIGIDBODY_H
+
+
+struct	PointerArray
+{
+	int		m_size;
+	int		m_capacity;
+	void	*m_data;
+};
+
+
+struct btPhysicsSystem
+{
+	PointerArray	m_collisionShapes;
+	PointerArray	m_collisionObjects;
+	PointerArray	m_constraints;
+};
+
+///we need this to compute the pointer sizes
+struct ListBase
+{
+	void *first;
+	void *last;
+};
+
+
+#endif