Add build status button.

Author: cahirwpz

README.md

@@ -1,9 +1,10 @@
 AmigaOS cross compiler for Linux / MacOSX / Windows
 ===
 
-##### It took me countless hours to put this fragile software together. The time I can spend to develop this project is limited. If you want binary builds, better support for Windows or any other [feature](https://github.com/cahirwpz/amigaos-cross-toolchain/wiki/TODO), please incentivize me by leaving a tip. I'd love to buy a new fast machine to shorten toolchain build time under virtual machines. Can you help it to happen by clicking a button below?
+##### It took me countless hours to put this fragile software together. The time I can spend to develop this project is limited. If you want binary builds, better support for Windows or any other [feature](https://github.com/cahirwpz/amigaos-cross-toolchain/wiki/TODO), please incentivize me by leaving a tip. 
 
 [![Donate](https://img.shields.io/badge/Donate-PayPal-green.svg)](https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=47CV5JMRW9BRA)
+[![Build Status](https://travis-ci.org/cahirwpz/amigaos-cross-toolchain.svg?branch=master)](https://travis-ci.org/cahirwpz/amigaos-cross-toolchain)
 
 **Author:** [Krystian Bacławski](mailto:[email protected])