Added query parameter API to plugin server

Change-Id: I8f79aeab8d281ac02f9a1b490351f020556ffcfb
diff --git a/dev/demo/export.html b/dev/demo/export.html
index 4de4ad5..ebd9539 100644
--- a/dev/demo/export.html
+++ b/dev/demo/export.html
@@ -15,7 +15,8 @@
     <script data-main="export.js" src="../js/lib/require.js" async="async"></script>
   </head>
   <body>
-     <p>To run this demo start the <a href= https://korap.ids-mannheim.de/gerrit/admin/repos/KorAP/KalamarExportPlugin> Plugin Server</a> as Java Application or with the jar file in the /target folder.</p>
+    <p>To run this demo start the <a href= https://korap.ids-mannheim.de/gerrit/admin/repos/KorAP/KalamarExportPlugin> Plugin Server</a> as Java Application or with the jar file in the /target folder.</p>
+    <p>Click <a href="?q=Wasser&ql=poliqarp">?q=Wasser&amp;ql=poliqarp</a> for a meaningful query.</p>
  
       <div id="resultinfo" class="found"></div>