Make more things into properties.

A lot of the expensive getters were transformed into cached properties
instead. A lot of things that were properties were transformed into
properties as well.

discord/state.py

@@ -169,7 +169,7 @@ class ConnectionState:
     def parse_guild_member_add(self, data):
         server = self._get_server(data.get('guild_id'))
         member = Member(server=server, deaf=False, mute=False, **data)
-        member.roles.append(server.get_default_role())
+        member.roles.append(server.default_role)
         server.members.append(member)
         self.dispatch('member_join', member)
 
@@ -195,7 +195,7 @@ class ConnectionState:
             member.name = user['username']
             member.discriminator = user['discriminator']
             member.avatar = user['avatar']
-            member.roles = [server.get_default_role()]
+            member.roles = [server.default_role]
             # update the roles
             for role in server.roles:
                 if role.id in data['roles']: