title: Tell when a CCAction is done running
body: <p>I want to be able to stop all actions when my animation sequence is done running, how would I do that? Right now i have:</p>
  
  <pre><code>CCAnimation *spinAnim = [CCAnimation
                                   animationWithSpriteFrames:spinAnimFrames delay:0.1125f];
          self.spinAction = [CCAnimate actionWithAnimation:spinAnim];
  </code></pre>
  
  <p>and then later:</p>
  
  <pre><code>[self.character runAction:self.spinAction];
  </code></pre>
  
  <p>So how would I be able to tell that the spin action is finished?</p>