message: Make observed world available
diff: @@ -61,6 +61,7 @@ void python_world(py::module m) {
  .def(py::init<const WorldPtr&, const AgentId&>())
  .def_property_readonly("ego_agent", &ObservedWorld::GetEgoAgent)
  .def_property_readonly("agents", &World::GetAgents)
  + .def("Evaluate", &World::Evaluate)
  .def_property_readonly("other_agents", &ObservedWorld::GetOtherAgents)
  .def("__repr__", [](const ObservedWorld& a) {
  return "bark.world.ObservedWorld";
  