Playing midi files

I've added a page explaining how to use midi files (.mid) to play songs with the instruments from the Rust - Instruments DLC. To get there just click the button on the front page. It's definitely a pain to set up. But once it's done you can just use a little bit of copy/paste and you're good to go. I think I've managed to cover everything in the most simple terms as possible. I know I tend to over explain things at times. But this time I kept it under control :)