added auto removal of deleted roles from the self assign roles. Starting to move the managment of data by the cogs into the cogs. And then making settings be something the cogs plug into.

roxbot/cogs/selfassign.py

@@ -36,6 +36,14 @@ class SelfAssign():
 	def __init__(self, Bot):
 		self.bot = Bot
 
+	async def on_guild_role_delete(self, role):
+		settings = gs.get(role.guild)
+		sa = settings.self_assign
+		for sa_role in sa["roles"]:
+			if int(sa_role) == role.id:
+				sa["roles"].remove(role.id)
+				return settings.update(sa, "self_assign")
+
 	@commands.command(pass_context=True)
 	async def listroles(self, ctx):
 		"""