Added 'Fork me on GitHub' ribbon to About/Support pane. Closes #57.

src/html/index.html

@@ -365,6 +365,9 @@
                     <div class="modal-footer">
                         <button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
                     </div>
+                    <a href="https://github.com/gchq/CyberChef">
+                        <img style="position: absolute; top: 0; right: 0; border: 0;" src="images/fork_me.png" alt="Fork me on GitHub">
+                    </a>
                 </div>
             </div>
         </div>

src/static/stats.txt

@@ -1,5 +1,5 @@
 210	source files
-114779	lines
+114832	lines
 4.3M	size
 
 141	JavaScript source files