organize audio

README.md

@@ -200,11 +200,11 @@ See also [http://areweideyet.com/](http://areweideyet.com/) and [Rust and IDEs](
 [[audio](https://crates.io/keywords/audio)]
 
 * [GuillaumeGomez/rust-fmod](https://github.com/GuillaumeGomez/rust-fmod) — [FMOD](http://www.fmod.org/) bindings [![Build Status](https://api.travis-ci.org/GuillaumeGomez/rust-fmod.svg?branch=master)](https://travis-ci.org/GuillaumeGomez/rust-fmod)
-* [RustAudio/rust-portaudio](https://github.com/RustAudio/rust-portaudio) — [PortAudio](http://www.portaudio.com/) bindings [<img src="https://travis-ci.org/RustAudio/rust-portaudio.svg?branch=master">](https://travis-ci.org/RustAudio/rust-portaudio)
 * [jhasse/ears](https://github.com/jhasse/ears) — a simple library to play Sounds and Musics, on top of OpenAL and libsndfile [<img src="https://travis-ci.org/jhasse/ears.svg?branch=master">](https://travis-ci.org/jhasse/ears)
 * [jpernst/openal-rs](https://github.com/jpernst/openal-rs) — [OpenAL 1.1](http://www.openal.org/) bindings [<img src="https://travis-ci.org/jpernst/openal-rs.svg?branch=master">](https://travis-ci.org/jpernst/openal-rs)
-* [RustAudio](https://github.com/RustAudio)
 * [musitdev/portmidi-rs](https://github.com/musitdev/portmidi-rs) — [PortMidi](http://portmedia.sourceforge.net/portmidi/) bindings [<img src="https://travis-ci.org/musitdev/portmidi-rs.svg?branch=master">](https://travis-ci.org/musitdev/portmidi-rs)
+* [RustAudio](https://github.com/RustAudio)
+  * [RustAudio/rust-portaudio](https://github.com/RustAudio/rust-portaudio) — [PortAudio](http://www.portaudio.com/) bindings [<img src="https://travis-ci.org/RustAudio/rust-portaudio.svg?branch=master">](https://travis-ci.org/RustAudio/rust-portaudio)
 
 ### Authentication