anchor.diff:  
   <h3>Current game id: <span id="game-id"></span></h3>
   <h3>Current score: <span id="game-score"></span></h3>
  -
  +<h3>Frame number: <span id="game-frames"></span></h3>
  +<h3>Game over: <span id="game-over"></span></h3>
   <br/>
   
   <form id="knocked-pins-form">
  
positive.code:         .success(function(data){
            console.log("Success on requesting GET '/games/" + current_game_id);
            $("#game-score").text(data.score);
          })
          .error(function(data){
            console.error("Error on requesting GET '/games/" + current_game_id);
  
negative.code:         .success(function(data){
            update_current_game_id(data.id);
            update_score();
            clear_error_message();
            console.log("Success on requesting POST '/games'. Created game with id: " + data.id);
          })
          .error(function(data){
  