Updated README

README.md

@@ -39,6 +39,27 @@ Features
 [jQuery]: http://api.jquery.com/animate
 [MooTools]: https://mootools.net/core/docs/1.6.0/Fx/Fx.Morph
 
+Integration
+===========
+
+```html
+<script type="text/javascript" src="/path/to/kss.min.js"></script>
+```
+
+Activating the MutationObserver:
+
+```html
+<script type="text/javascript" src="/path/to/kss.min.js"></script>
+<script type="text/javascript">
+    kss.useObserver = true;
+</script>
+```
+
+Using the MutationObserver has the advantage that KSS is notified about all
+DOM manipulations even if modified by third-party scripts.
+MutationObservers are available from IE11.
+There exists a [polyfill for IE9-10](https://github.com/googlearchive/MutationObservers)
+
 Example
 =======