Remove setting up of

Remove setting up of
describe-european-environment-map and
setup-european-environment-map.  Exclude them in args of calls to
set-language-info-alist.  Adjusted for the change of
make-coding-system.  Register coding-priority key in
language-info-alist.  Add "German" language env.
(setup-8-bit-environment): Delete CODING-SYSTEM arg.
(iso-latin-1): Make it compatible with MIME-charset "iso-8859-1"
(compound-text): New coding system.  `ctext' is now alias of it.
(setup-german-environment): New function.