Add Client.change_status.
Add Client.change_status.

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