Add Justin to about page

plugins/c9.ide.help/help.xml

@@ -22,7 +22,7 @@
             <div class="c9Staff">
                 <p textselect="true">
                     Arron Bailiss, Bas de Wachter, Fabian Jakobs, Harutyun Amirjanyan,
-                    Ivar Pruijn, Lennart Kats, Luca Cipriani,
+                    Ivar Pruijn, Justin Dray, Lennart Kats, Luca Cipriani,
                     Mostafa Eweda, Matthijs van Henten, Nikolai Onken, Tim Robinson, Ruben Daniels
                 </p>
             </div>