Added query selector prototype

Change-Id: I9554f0d242b7ee3132d5aee53683ec3cd0261314
diff --git a/dev/demo/query-creator.html b/dev/demo/query-creator.html
new file mode 100644
index 0000000..7893395
--- /dev/null
+++ b/dev/demo/query-creator.html
@@ -0,0 +1,54 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <title>Query creator demo</title>
+    <meta charset="utf-8" />
+    <style type="text/css" rel="stylesheet">
+      * {
+      outline: none;
+      }
+      td {
+      cursor: pointer;
+      }
+      input {
+      display: block;
+      width: 80%;
+      }
+    </style>
+  </head>
+  <body>
+    <div class="matchinfo">
+      <table>
+        <thead>
+          <tr>
+            <th>Foundry</th>
+            <th>Layer</th>
+            <th>Der</th>
+            <th>älteste</th>
+            <th>lebende</th>
+            <th>Baum</th>
+          </tr>
+        </thead>
+        <tbody>
+          <tr tabindex="0">
+            <th>corenlp</th>
+            <th>p</th>
+            <td>ART</td>
+            <td>ADJA</td>
+            <td>ADJA</td>
+            <td>NN</td>
+          </tr>
+          <tr tabindex="0">
+            <th>opennlp</th>
+            <th>p</th>
+            <td>ART</td>
+            <td>ADJA</td>
+            <td>ADJA</td>
+            <td>NN</td>
+          </tr>
+        </tbody>
+      </table>
+    </div>
+  </body>
+  <script src="query-creator.js"></script>
+</html>