* .gitignore: Merge contents of subsidiary files and organize the
result so as to avoid duplication.  Remove no-longer needed entries.
* admin/charsets/.gitignore, admin/unidata/.gitignore:
* doc/lispintro/.gitignore, etc/.gitignore, leim/.gitignore:
* leim/ja-dic/.gitignore, lib-src/.gitignore, lisp/.gitignore:
* lisp/calc/.gitignore, lisp/calendar/.gitignore:
* lisp/cedet/.gitignore, lisp/emulation/.gitignore:
* lisp/erc/.gitignore, lisp/eshell/.gitignore, lisp/gnus/.gitignore:
* lisp/international/.gitignore, lisp/language/.gitignore:
* lisp/leim/.gitignore, lisp/leim/quail/.gitignore:
* lisp/mail/.gitignore, lisp/mh-e/.gitignore, lisp/net/.gitignore:
* lisp/nxml/.gitignore, lisp/obsolete/.gitignore:
* lisp/play/.gitignore, lisp/progmodes/.gitignore:
* lisp/term/.gitignore, lisp/textmodes/.gitignore:
* lisp/url/.gitignore, nt/.gitignore, src/.gitignore:
Remove; no longer needed.

ja-dic.el no longer needs to be in the repository: it's now
generated as part of the build from bzr.  Also, update SKK-JISYO.L to
match the upstream source exactly.
* .bzrignore: Add leim/ja-dic/.
* leim/ja-dic/ja-dic.el: Remove from repository.  It is still distributed
as part of the Emacs tarball.
* leim/Makefile.in ($(srcdir)/ja-dic/ja-dic.el): New rule.
(compile-main): Depend on it.
* leim/SKK-DIC/README: Update to reflect new build procedure.
* leim/SKK-DIC/SKK-JISYO.L: Update to match source exactly.
This is now the annotated version, to match the upstream file name;
the unannotated one is built from it automatically.
* lisp/international/ja-dic-cnv.el (skkdic-convert): Remove the annotations
from the input, rather than assume that it's been done for us by the
SKK script unannotate.awk.  Switch ja-dic.el to UTF-8.  Don't put
the current date into a ja-dic.el comment, as that complicates
regression testing.

Fixes: debbugs:13984