message: Add method to add completed technology ID
diff: @@ -26,6 +26,13 @@ public:
  return mTechnologiesBeingResearched;
  }
  +
  + void addCompletedResearch(int techId)
  + {
  + mCompleted.push_back(techId);
  + }
  +
  +
  void startResearch(int techId, int progress, int assigned);
  void updateResearch(int techId, int progress, int assigned);
  const std::tuple<int, int>& researchProgress(int techId) const;
  