add name for collision shape and constraint serialization (to objects, shapes and constaints can be mapped to user data)

updated serialization structures and header files (for new 'm_name' field, replacing user pointer)
fix issue with  btGeneric6DofConstraint::setParam in headerfile

Extras/Serialize/BulletFileLoader/autogenerated/bullet_btCollisionShapeData.h

@@ -31,7 +31,7 @@ namespace Bullet {
     class btCollisionShapeData
     {
     public:
-        void *m_userPointer;
+        char *m_name;
         int m_shapeType;
         char m_padding[4];
     };