Fix and standardize some copyright and license notices

Fix and standardize some copyright and license notices

* ob-abc.el: Add year, part of Emacs, standardize license text.

* ob-ebnf.el: Part of Emacs, standardize license text.

* ob-makefile.el: Fix years.

* org-macro.el, ox-beamer.el, ox-latex.el, ox-org.el: Part of Emacs.

* ox-ascii.el, ox-md.el, ox.el: Use range for years, part of Emacs.

* ox-html.el: Part of Emacs.
(org-html-scripts): Add 2013 to copyright years.
(org-html-infojs-template): Set copyright holder to FSF.

* ox-icalendar.el: Part of Emacs, fix years.

* ox-texinfo.el: Copyright to FSF, use range for years.