Changed Piotr's title on the main page. Small change wanting to piggyback on the code push.

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         <img src="/static/staff/pmitros-small.jpg" alt="Piotr Mitros">
         <h2>Piotr Mitros</h2>
-        <p>Research Scientist at MIT. His research focus is in finding ways to apply techniques from control systems to optimizing the learning process. Dr. Mitros has worked as an analog designer at Texas Instruments, Talking Lights, and most recently, designed the analog front end for a novel medical imaging modality for Rhythmia Medical.</p></li>
+        <p>Chief Scientist of edX and Research Scientist at MIT. His research focus is in finding ways to apply techniques from control systems to optimizing the learning process. Dr. Mitros has worked as an analog designer at Texas Instruments, Talking Lights, and most recently, designed the analog front end for a novel medical imaging modality for Rhythmia Medical.</p></li>
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