codepage support extention

GNU Emacs 21 support cp1250, cp1251, cp1253 and cp1257. But they don't support characters in 0x80-0x9F.
This program support them, and provide cp1252, cp1254 and cp1255 additionally.
(GNU Emacs 22 support them by loading the `code-pages' library.)

How to use

1. Download codepage-ex.el.
2. Install it in `load-path'.
3. Put followings into your ~./.emacs file.
   

   (unless (require 'code-pages nil t)
     (require 'codepage-ex)
     (mapc (lambda (cp) (codepage-ex-setup (car cp)))
   	(cp-ex-supported-codepages)))
   

4. Specify cp125X as coding-system. For example, when you want to open a file encoded cp1251, type C-x RET c cp1251 RET C-x C-f filename RET.