Merge pull request #608 from sourcelair/add-logo

Add xterm.js logo

README.md

@@ -1,4 +1,4 @@
-# xterm.js
+# [![xterm.js logo](logo.png)](https://xtermjs.org)
 
 [![xterm.js build status](https://api.travis-ci.org/sourcelair/xterm.js.svg)](https://travis-ci.org/sourcelair/xterm.js) [![Coverage Status](https://coveralls.io/repos/github/sourcelair/xterm.js/badge.svg)](https://coveralls.io/github/sourcelair/xterm.js) [![Gitter](https://badges.gitter.im/sourcelair/xterm.js.svg)](https://gitter.im/sourcelair/xterm.js?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge)