use the minified file in the demo

Author: crisbeto

build/index.html

@@ -215,10 +215,7 @@ <h2>Clock example</h2>
     </div>
 
     <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.3.14/angular.js"></script>
-    <script src="../src/module.js"></script>
-    <script src="../src/roundProgress.js"></script>
-    <script src="../src/roundProgressService.js"></script>
-    <script src="../src/roundProgressConfig.js"></script>
+    <script src="roundProgress.js"></script>
     <script>
         'use strict';