* mixi.el (mixi-make-community): New slot `members'.

* mixi.el (mixi-make-community): New slot `members'.
(mixi-community-members): New accessor method.
(mixi-community-set-members): Ditto.
(mixi-community-members-regexp): New constant.
(mixi-community-realize): Use them.

* mixi.el (mixi-make-community): New slot `open level'.
(mixi-community-open-level): New accessor method.
(mixi-community-set-open-level): Ditto.
(mixi-community-open-level-regexp): New constant.
(mixi-community-realize): Use them.

* mixi.el (mixi-make-community): New slot `authority'.
(mixi-community-authority): New accessor method.
(mixi-community-set-authority): Ditto.
(mixi-community-authority-regexp): New constant.
(mixi-community-realize): Use them.