Add Guild.create_text_channel and Guild.create_voice_channel.
Add Guild.create_text_channel and Guild.create_voice_channel.

mgardne8/discord.py,rapptz/discord.py,Rapptz/discord.py,Harmon758/discord.py,imayhaveborkedit/discord.py,Harmon758/discord.py,variablehair/Eggplantato,khazhyk/discord.py