do ctrl+z snapshots when loading saves / stamps, makes it more predictable to fix problems in issue #110

src/gui/game/GameController.cpp

@@ -271,6 +271,7 @@ void GameController::PlaceSave(ui::Point position)
 	{
 		gameModel->GetSimulation()->Load(position.X, position.Y, gameModel->GetPlaceSave());
 		gameModel->SetPaused(gameModel->GetPlaceSave()->paused | gameModel->GetPaused());
+		HistorySnapshot();
 	}
 }
 

src/gui/game/GameView.cpp

@@ -953,6 +953,7 @@ void GameView::NotifySaveChanged(GameModel * sender)
 		tagSimulationButton->SetText("[no tags set]");
 		currentSaveType = 0;
 	}
+	c->HistorySnapshot();
 }
 
 void GameView::NotifyBrushChanged(GameModel * sender)