Add README with build and run instructions.

.gitignore

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 Cargo.lock
 .cargo
 spotify_appkey.key
+.vagrant/

README.md

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+# librespot
+*librespot* is an open source client library for Spotify. It enables
+applications to use Spotify's service, without using the official but
+closed-source libspotify. Additionally, it provides extra features which are
+not available in the official library.
+
+## Status
+*librespot* is currently under development and is not fully functional yet. You
+are however welcome to experiment with it.
+
+## Building
+Building *librespot* requires rust nightly. It will not work on rust stable or
+beta.
+
+You will also need the protobuf compiler, and the
+[rust-protobuf](https://github.com/stepancheg/rust-protobuf) plugin.
+`protoc-gen-rust` must be in your `$PATH`.
+
+Once you've cloned this repository you can build *librespot* using `cargo`.
+```shell
+cargo build
+```
+
+## Usage
+A sample program implementing a headless Spotify Connect receiver is provided.
+Once you've built *librespot*, run it using :
+```shell
+target/release/main APPKEY USERNAME PASSWORD CACHEDIR DEVICENAME
+```
+where `APPKEY` is the path to a Spotify application key file, `USERNAME` and
+`PASSWORD` are your Spotify credentials, `CACHEDIR` is the path to directory
+where data will be cached, and `DEVICENAME` is the name that will appear in the
+Spotify Connect menu.
+
+## Disclaimer
+Using this code to connect to Spotify's API is probably forbidden by them, and
+might result in you application key getting banned. Use at you own risk
+
+## Contact
+Come and hang out on gitter if you need help or want to offer some.
+https://gitter.im/sashahilton00/spotify-connect-resources
+
+## License
+Everything in this repository is licensed under the MIT license.
+