Add a tour to the animation example

examples/animation.html

@@ -10,9 +10,10 @@ tags: "animation"
 <div id="map" class="map"></div>
 <button id="rotate-left" title="Rotate clockwise">↻</button>
 <button id="rotate-right" title="Rotate counterclockwise">↺</button>
-<button id="rotate-around-rome">Rotate around Rome</button>
 <button id="pan-to-london">Pan to London</button>
 <button id="elastic-to-moscow">Elastic to Moscow</button>
 <button id="bounce-to-istanbul">Bounce to Istanbul</button>
 <button id="spin-to-rome">Spin to Rome</button>
 <button id="fly-to-bern">Fly to Bern</button>
+<button id="rotate-around-rome">Rotate around Rome</button>
+<button id="tour">Take a tour</button>