title: Move particles without moving particle emitter
body: <p>I have question about Particles in cocos2d. How can I move particles without moving particle emitter. I want to have such move like in doodle jump(snowing map).I set position type to kCCPositionTypeGrouped and move my particles in this way:</p>
  
  <pre><code>CCAction *movePlankton = [CCMoveTo actionWithDuration:0.6f position:CGPointMake(planktonEmitter.position.x, planktonEmitter.position.y+distanceToMove)];
      [planktonEmitter runAction:movePlankton];
  </code></pre>
  
  <p>But this move particle emitter too, and after few moves on my screen i haven't any particles.</p>
  
  <p>Can somebody help me with this?
  Thanks.</p>