Added hh extension to allow use of hack language

Marius Cramer

2014-04-30 c04e793d51fe34780247f8eda799a7003bb23ed3

 interface/web/help/index.php

@@ -10,8 +10,7 @@
  <p>&nbsp;</p>
  <p>&nbsp;</p>
  <p>&nbsp;</p>
  <p>&nbsp;
            </p>
  <p>&nbsp;</p>
</div>
</BODY>
</HTML>
</HTML>