Introduced relation visualizations

Change-Id: I4863873d28f0b757ee5c64aa7db249266462b31d
diff --git a/dev/demo/relationsdemo.js b/dev/demo/relationsdemo.js
new file mode 100644
index 0000000..5c28f9a
--- /dev/null
+++ b/dev/demo/relationsdemo.js
@@ -0,0 +1,9 @@
+requirejs.config({
+  baseUrl: '../js/src'
+});
+
+require(['match/relations'], function (relClass) {
+  var rel = relClass.create();
+  document.getElementById("tree").appendChild(rel.element());
+  rel.show();
+});