v1.1.2: initial playlist support

• Youtube and Soundcloud playlists are supported, just pass the url as you would do normally (cobalt https://youtube.com/playlist?list=PLDKxz_KUEUfPQ1l07sMf4Ql7QV0M2uag4) and it will download everything possible;
• Added -P flag to only print the stream url to stdout;
• Reworked -s flag to save to directory now.