#12 doc for general usage

Author: ScreamingDev

doc/00-introduction.md

@@ -5,3 +5,10 @@ An extension to help you develop beautiful Magento Stores.
 <small>
     Created by [Mike Pretzlaw](http://mike-pretzlaw.de) / [@fxrmp](http://twitter.com/fxrmp)
 </small>
+
+
+## Menu and Notifications
+
+- On the top will persist a warning while you have the extension installed.
+- A new menu "Development" will give you access to handy solutions.
+- `System > Config > Developer Mode` is an additional tab with helpful settings.