move intro code to appendix

Author: astearns

css3-animations/Overview.html

@@ -1381,10 +1381,10 @@ <h2 id=animation-events><span class=secno>4. </span><a
    <dt> <b>animationiteration</b>
 
    <dd> The &lsquo;<code class=property>animationiteration</code>&rsquo;
-    event occurs at the end of each iteration of an animation for which <a
-    href="#animation-iteration-count"><code>animation-iteration-count</code></a>
-    is greater than one. This event does not occur for animations with an
-    iteration count of one.
+    event occurs at the end of each iteration of an animation, except when an
+    &lsquo;<code class=property>animationend</code>&rsquo; event would fire
+    at the same time. This means that this event does not occur for
+    animations with an iteration count of one or less.
     <ul>
      <li>Bubbles: Yes
 

css3-animations/Overview.src.html

@@ -1376,7 +1376,8 @@ <h2 id="animation-events"><a id="animation-events-">
           <b>animationiteration</b>
         </dt>
         <dd>
-          The 'animationiteration' event occurs at the end of each iteration of an animation for which <code>animation-iteration-count</code> is greater than one. This event does not occur for animations with an iteration count of one.
+          The 'animationiteration' event occurs at the end of each iteration of an animation, except when an 'animationend' event would fire at the same time.  
+          This means that this event does not occur for animations with an iteration count of one or less.
           <ul>
             <li>Bubbles: Yes
             </li>