Wrapped package for composer

The package will really benefit from being a composer package. It's much easier to install and update, instead of having to replace the command file manually.

To work, it will need to be added to the [packagist.org](http://www.packagist.org) website. Just login with github and add the package. It's a very easy process.

Oh, I took the liberty of adding some more words to the readme file :)