Adds testem support

- [testem](https://github.com/airportyh/testem)

Author: sukima

jskoans.htm

@@ -5,6 +5,10 @@
   <script src="support/jquery-1.4.1.js"></script>
   <link rel="stylesheet" href="support/qunit.css" type="text/css" media="screen" />
   <script type="text/javascript" src="support/qunit.js"></script>
+
+  <!-- This will silently fail when not running in a testem environment. Safe to ignore. -->
+  <script type="text/javascript" src="testem.js"></script>
+
   <script type="text/javascript" src="support/koans.js"></script>
   <script type="text/javascript" src="topics/about_asserts.js"></script>
   <script type="text/javascript" src="topics/about_operators.js"></script>

testem.json

@@ -0,0 +1,4 @@
+{
+  "framework": "qunit",
+  "test_page": "jskoans.htm"
+}