Added badge to readme which links to docs

Author: jonathanballs

README.md

@@ -1,5 +1,6 @@
-Cabot [![Build Status](https://travis-ci.org/arachnys/cabot.svg?branch=master)](https://travis-ci.org/arachnys/cabot)
+Cabot
 =====
+[![Build Status](https://img.shields.io/travis/arachnys/cabot/master.svg)](https://travis-ci.org/arachnys/cabot) [![docs](http://img.shields.io/badge/docs-latest-brightgreen.svg)](http://cabotapp.com/qs/quickstart.html)
 
 Cabot is a free, open-source, self-hosted infrastructure monitoring platform that provides some of the best features of [PagerDuty](http://www.pagerduty.com), [Server Density](http://www.serverdensity.com), [Pingdom](http://www.pingdom.com) and [Nagios](http://www.nagios.org) without their cost and complexity. (Nagios, I'm mainly looking at you.)