Fix fontification of some biblatex macros.

* font-latex.el (font-latex-built-in-keyword-classes): Fix
fontification of some biblatex macros.  Reported by Christian
Knüpfer.
Revert changes made with commit 7531cca to font-latex.el.

* font-latex.el (font-latex-built-in-keyword-classes): Revert
changes made with commit 7531cca, they were useless.
Update reference from CVS to Git in some comments.

* auctex.spec (Provides): Update reference to Git in comment.

* bib-cite.el: Update AUCTeX repository link in comment.
Convert release process to Git.

* Makefile.in: Update copyright years.
(GITFILES): Rename from `CVSFILES', adapt to Git.
(COMMITTER): Get user name and email from Git configuration;
escape `<', `>' and spaces.
(install-el): Update reference to Git in comment.
(release-commit): Adapt to Git; make sure committer name and email
are encoded with ISO-8859-1 using the `iconv' program.
(tar-ball): Adapt to Git.
(preview-ball): Ditto.