orgcard.tex: Adjust for sync with Emacs

Based on Emacs's e90dec2be1 (* etc/refcards/orgcard.tex: Revert part
of previous change., 2014-01-07).

Note, however, that \orgversionnumber is still at 8.2 in the Org repo.
We update information that out-of-date and then set it to the
appropriate version number.

doc/orgcard.tex

@@ -1,7 +1,7 @@
 % Reference Card for Org Mode
 \def\orgversionnumber{8.2}
 \def\versionyear{2014}          % latest update
-\def\year{2014}                 % latest copyright year
+\input emacsver.tex
 
 %**start of header
 \newcount\columnsperpage