Travis CI build status image in README

README.md

@@ -1,6 +1,8 @@
 YouCompleteMe: a code-completion engine for Vim
 ===============================================
 
+[![Build Status](https://travis-ci.org/Valloric/YouCompleteMe.png?branch=travis)](https://travis-ci.org/Valloric/YouCompleteMe)
+
 YouCompleteMe is a fast, as-you-type, fuzzy-search code completion engine for
 [Vim][]. It has several completion engines: an identifier-based engine that
 works with every programming language, a semantic, [Clang][]-based engine that