Add deprecation notice to README

# DalekJS is not maintained any longer 😢

We recommend [TestCafé](http://devexpress.github.io/testcafe/) for your automated browser testing needs.

README.md

@@ -1,7 +1,15 @@
+[![No Maintenance Intended](http://unmaintained.tech/badge.svg)](http://unmaintained.tech/)
+
+# DalekJS is not maintained any longer :cry:
+
+We recommend [TestCafé](http://devexpress.github.io/testcafe/) for your automated browser testing needs.
+
+---
+
 dalek-internal-reporter
 =======================
 
 > The content of this repository has been moved to [Dalek Core](https://github.com/dalekjs/dalek/blob/master/lib/dalek/reporter.js)
 
 This has been done to simplify the installation process, get develeopment environments up & running more quickly.
-Not in the name of the doctor, but in the name of peace & sanity
+Not in the name of the doctor, but in the name of peace & sanity