Rework playlist example to work with multi-server voice.
Rework playlist example to work with multi-server voice.

imayhaveborkedit/discord.py,khazhyk/discord.py,mgardne8/discord.py,jhgg/discord.py,Theoretical/UselessBot,Harmon758/discord.py,Rapptz/discord.py,lgkern/PriestPy,Harmon758/discord.py,variablehair/Eggplantato,rapptz/discord.py