Fix conflicts with __slots__ and the new properties under Server.
Fix conflicts with __slots__ and the new properties under Server.

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