("codepage"): Add eval-after-load

("codepage"): Add eval-after-load
stuff.
(non-iso-charset-alist): New variable.
(cp-make-coding-system): Fix valid-codes.  Update
`non-iso-charset-alist'.
(cp855): Fix a code point (recode bug).
(cyrillic-alternativnyj, alternativnyj): New aliases.
(koi8-u, koi8-r): Add mode-line indicator.
(cp737, koi8-t, iso-latin-10, iso-8859-16, latin-10)
(arabic-iso-8bit, iso-8859-6, iso-latin-6, iso-8859-10, latin-6)
(iso-latin-7, latin-7, iso-8859-13, georgian-ps, cp720): New
coding systems.
(cp-supported-codepages, codepage-setup): New functions.
(cp-make-translation-table): Simplify.
(cp-fix-safe-chars): New function.  Use it in several places to
reset effects of any previous definitions.
(koi8-r): Make this the base name, since it's the preferred MIME
name.