title: tinyMCE turning <i> into <em> on getContent
body: <p>in the dom in my tinyMCE editor i see </p>
  
  <pre><code>&lt;p&gt;
    &lt;i&gt;testing 123&lt;/i&gt;
  &lt;/p&gt;
  </code></pre>
  
  <p>but when i run </p>
  
  <pre><code>tinyMCE.activeEditor.getContent()
  </code></pre>
  
  <p>it returns</p>
  
  <pre><code>&lt;p&gt;
    &lt;em&gt;testing 123&lt;/em&gt;
  &lt;/p&gt;
  </code></pre>
  
  <p>Why is it changing <code>&lt;i&gt;</code> into <code>&lt;em&gt;</code>? Im having problems with this because i want to insert text dynamically that is surrounded with  tags and things are getting confusing.</p>