#12 Added guide on saving Soundcloud direct download enabled tracks to Archive.org

This merge request proposes to add a small guide on how to save tracks that have direct download enabled into archive.org. This means that if a SoundCloud gets deleted, then there is a direct download from archive.org which will allow anyone to download a track from archive.org as if they are direct downloading from SoundCloud. The FAQ has been updated to link to this guide, as well some minor spelling corrections.