Music Manager Update

0.3.00 is the first full release of Disnode that we support. We have made Disnode overall more stable with additions such as a custom Error Handler, config auto-generates, and better null checks/defaults. We have almost, most notably, merged YoutubeManger, VoiceManager, and AudioPlayer in Music Manager. We now support music streaming from youtube and queues. Playlists and saving links coming in 0.3.01