title: Markdown mode codemirror creating
body: <p>anyone can help me to create new mode to codemirror?</p>
  
  <p>I need to put this part <code>{&gt;1&lt;}</code> of <code>{&gt;1&lt;}![title](site)</code> invisible (into span with specific class)</p>
  
  <p>How I can do that?</p>
  
  <p>I tryed something like that:</p>
  
  <pre><code>CodeMirror.defineSimpleMode("imageID", {
      start: [
         {regex: /(?:\{\&gt;([^&lt;]*)\&lt;\})/gmi, token: "imageID"}
      ]
  });
  </code></pre>
  
  <p>but it doesn't work... any ideas why?</p>