add version choose to help

app.js

@@ -1,3 +1,5 @@
+/** Copyright Stewart Allen <sa@grid.space> -- All Rights Reserved */
+
 function require_fresh(path) {
     const rpa = require.resolve(path);
     delete require.cache[rpa];

web/kiri/lang/en-help.html

@@ -47,6 +47,8 @@
     Join the <a target="_fb" href="https://www.facebook.com/groups/kirimoto">user group</a> on Facebook
     <br>
     Visit the <a target="_help" href="https://wiki.grid.space/wiki/Kiri:Moto">Wiki</a> on Github
+    <p style="text-align:center; font-size:smaller">... or ...</p>
+    <p>Choose another <a target="_help" href="/choose">version</a> of Kiri:Moto</p>
     </div>
 
     <div class="help-post"><p id="kiri-version"></p></div>