README: Explain how this project has replacement in projects like cucumber-pretty-formatter (#44)

* README: Link to Cucumber-JVM, -js

* README: Update description more clearly

Author: olleolleolle

README.md

@@ -1,5 +1,10 @@
 [![build status](https://secure.travis-ci.org/cucumber/cucumber-html.svg)](http://travis-ci.org/cucumber/cucumber-html)
-Cucumber-HTML is a cross-platform HTML formatter for all the Cucumber implementations. It's currently only used by Cucumber-JVM and Cucumber.js, but may be used by other implementations later.
+
+Cucumber-HTML is a cross-platform HTML formatter for all the Cucumber implementations. It's currently only used by Cucumber-JVM ~and Cucumber.js, but may be used by other implementations later~.
+
+> **Update August 2017**: Cucumber.js does not use this project.
+>
+> The current thinking is to replace formatters like the HTML formatter and Pretty formatter with event-based, all-platform compatible utilities in the spirit of [cucumber-pretty-formatter](https://github.com/cucumber/cucumber-pretty-formatter) (a work-in-progress).
 
 ## Prerequisites