I ran into the issue that many others have cited: an inability to add short titles, etc., to org-mode-generated Beamer presentations [1, 2, 3]. This patch allows such capability through a BEAMER_HEADER_EXTRA tag, which is placed after title, author, etc., but before `\begin{document}`.  Short titles, for example, can now be added via

```

#+BEAMER_HEADER_EXTRA: \title[A Short Title]{ \inserttitle }

```

Something like this appears to have been in the original org-beamer.el, but was not present in the current master HEAD ox-beamer.el. If the community/BD deems this to be worthy, I'd be happy to clean it up as needed.

Cheers,

Matt

[1] http://comments.gmane.org/gmane.emacs.orgmode/57450

[2] https://lists.gnu.org/archive/html/emacs-orgmode/2011-01/msg00176.html

[3] http://stackoverflow.com/questions/26760125/org-mode-beamer-how-to-create-a-short-title-author-date 
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