showdown in its own directory in support

It was only one not in core amber platform support
that was not in dedicated subdir.

helios.html

@@ -15,7 +15,7 @@
       <script type='text/javascript' src='support/jQuery/jquery-1.8.2.min.js'></script>
       <script type='text/javascript' src='support/jQuery/jquery-ui-1.8.24.custom.min.js'></script>
       <script type='text/javascript' src='support/bootstrap/js/bootstrap.js'></script>
-      <script type='text/javascript' src='support/showdown.js'></script>
+      <script type='text/javascript' src='support/showdown/showdown.js'></script>
       <script type='text/javascript' src='support/amber4browser.js'></script>
       <script type='text/javascript'>
         loadAmber({packages: [