The manuals often used quotes ``...'' when it is better to use @dfn or
@code or capitalized words or no quoting at all.  For example, there is
no need for the `` and '' in “if a variable has one effect for
@code{nil} values and another effect for ``non-@code{nil}'' values”.
Reword the Emacs, Lisp intro, and Lisp reference manuals to eliminate
unnecessary quoting like this, and to use @dfn etc. instead when called
for (Bug#21472).

* doc/lispref/intro.texi (Version Info): Update example.

Run admin/update-copyright.

This is in preparation for generating the former automatically
from the latter.
* admin/notes/bugtracker, admin/notes/copyright, admin/notes/newfile:
ChangeLog -> change log
* admin/notes/changelogs: Remove, merging old contents to ...
* admin/notes/repo: ... here.
* doc/emacs/maintaining.texi (Change Log): Mention that ChangeLog files may
be copied to or from a version control system.
* doc/emacs/trouble.texi (Sending Patches): Point to the commit messages.
* doc/lispref/intro.texi (Acknowledgments): ChangeLog file -> change log entries.
* doc/lispref/tips.texi (Library Headers): Emacs uses a version control system.
* etc/CONTRIBUTE: Give advice about git commit messages and how
to generate proposed patches containing them.

* doc/emacs/ack.texi (Acknowledgments):
* doc/emacs/emacs.texi (Acknowledgments):
* doc/lispref/intro.texi (Acknowledgments): Use accented form of some names.

* lisp/emacs-lisp/authors.el (authors-aliases, authors-ignored-files):
Add some entries.
(authors-fixed-entries): Use accented form of name.

With GNU Texinfo 5.0, this generates nicer-looking info files,
since they can use curly quotes.  With older Texinfo it doesn't matter.