Client.join_voice_channel now accepts an Object.
Client.join_voice_channel now accepts an Object.

Fixes #62.

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