message: Extended StepCountEvaluator
diff: #include <memory>
  #include "modules/world/evaluation/base_evaluator.hpp"
  +#include "modules/world/observed_world.hpp"
  namespace modules {
  namespace world {
  class World;
  +class ObservedWorld;
  namespace evaluation {
  class EvaluatorStepCount : public BaseEvaluator {
  @@ -26,6 +28,11 @@ class EvaluatorStepCount : public BaseEvaluator {
  return this->steps_;
  }
  + EvaluationReturn Evaluate(const world::ObservedWorld& world) {
  + this->steps_++;
  + return this->steps_;
  + }
  +
  private:
  int steps_;
  };
  