In .X ascii files, the speed of the animation is stored as a template that follows this format:
    // This can be found in many ascii .X files, and can be added to ascii
    // .X files that do not contain it.
    AnimTicksPerSecond
    {
      <ticks per second>;
    }


We add an <animtickspersecond> node because the content pipeline processors give no information on keyframe indices to the processor; they just store keyframes as time/transform pairs. Note that adding this node is optional if we want to split up the animation by time rather than by keyframe index