Add build status to README

Author: mischov

README.md

@@ -1,5 +1,7 @@
 # Meeseeks_Html5ever
 
+[![Build Status](https://travis-ci.org/mischov/meeseeks_html5ever.svg?branch=master)](https://travis-ci.org/mischov/meeseeks_html5ever)
+
 A fork of Hansihe's [html5ever_elixir](https://github.com/hansihe/html5ever_elixir) that is more tightly coupled with [Meeseeks](https://github.com/mischov/meeseeks).
 
 ## Installation