Fix some stream urls not being detected

Should fix issue #71 

I didn't test it on the mentioned stream in that issue, but I did try all the featured streams and a couple didn't play, seemed to be the same reason that was reported. After these edits, the streams started playing normally.

I removed the "saving url to playlist" as it didn't really seem necessary, hope that's ok, and was kinda the cause of the initial problem. I now just parse the playlist received from twitch for the playable urls.