ANN add Tim Head in contributor experience team
<a href='https://github.com/albertcthomas'><img src='https://avatars.githubusercontent.com/u/15966638?v=4' class='avatar' /></a> <br />
<p>Albert Thomas</p>
</div>
+ <div>
+ <a href='https://github.com/betatim'><img src='https://avatars.githubusercontent.com/u/1448859?v=4' class='avatar' /></a> <br />
+ <p>Tim Head</p>
+ </div>
</div>
