1. PROTOTYPE CHANGE: Engine::action(Body*) changed to Engine::action(MetaBody*); all engines adapted
2. MetaBody::miscParams can be used to set static variables at deserialization (used for GLDrawBrefcomContact now)
3. allow serialization of shared_ptr<Serializable> (only pointers to derived classes were enabled until now)
4. big fixes inside brefcom
5. enhancements of python interface (Generic class, fixes)
6. added Shop::GLDrawLine, Shop::GLDrawArrow, Shop::GLDrawNum
7. fixed QGLViewer #defining DEBUG (qt3) by #undef'ing it after qt3 headers inclusion