updated README.md

- signed-off-by: trimstray <trimstray@gmail.com>

README.md

@@ -3,7 +3,37 @@
         alt="Master">
 </p>
 
+<br>
+
 <h4 align="center">A collection of awesome lists, manuals, hacks and tools for <b>Awesome Ninja Admins.</h4>
 
 <br>
 
+### :bangbang: **This documentation is incomplete and constantly developed.**
+
+<p align="center">
+  <a href="https://github.com/trimstray/awesome-ninja-admins/tree/master">
+    <img src="https://img.shields.io/badge/Branch-master-green.svg?longCache=true&style=for-the-badge"
+        alt="Branch">
+  </a>
+  <a href="https://awesome.re">
+    <img src="https://awesome.re/badge-flat.svg"
+        alt="Awesome">
+  <a href="http://www.gnu.org/licenses/">
+    <img src="https://img.shields.io/badge/license-GNU-blue.svg?longCache=true&style=for-the-badge"
+        alt="License">
+  </a>
+</p>
+
+<div align="center">
+  <sub>Created by
+  <a href="https://twitter.com/trimstray">trimstray</a> and
+  <a href="https://github.com/trimstray/awesome-ninja-admins/graphs/contributors">
+    contributors
+  </a>
+</div>
+
+<br>
+
+***
+