add Travis badge

README.md

@@ -21,7 +21,7 @@ Only projects that are more than a prototype should be added. Projects that do n
 * [bjz/openal-rs](https://github.com/bjz/openal-rs/) — [OpenAL 1.1](http://www.openal.org/) bindings
 * [JeremyLetang/ears](https://github.com/JeremyLetang/ears) — a simple library to play Sounds and Musics, on top of OpenAL and libsndfile [<img src="https://travis-ci.org/jeremyletang/ears.png?branch=master">](https://travis-ci.org/JeremyLetang/ears)
 * [JeremyLetang/rust-portaudio](https://github.com/JeremyLetang/rust-portaudio) — [PortAudio](http://www.portaudio.com/) bindings [<img src="https://travis-ci.org/jeremyletang/rust-portaudio.png?branch=master">](https://travis-ci.org/JeremyLetang/rust-portaudio)
-* [musitdev/rust-portmidi](https://github.com/musitdev/rust-portmidi) — [PortMidi](http://portmedia.sourceforge.net/portmidi/) bindings
+* [musitdev/rust-portmidi](https://github.com/musitdev/rust-portmidi) — [PortMidi](http://portmedia.sourceforge.net/portmidi/) bindings [<img src="https://travis-ci.org/musitdev/rust-portmidi.png?branch=master">](https://travis-ci.org/musitdev/rust-portmidi)
 
 ### Compression