Add autoload instruction before org-version

* org.el (org-version): Add autoload cookie.

TINYCHANGE

lisp/org.el

@@ -211,6 +211,7 @@ identifier."
 (defconst org-version "7.8.03"
   "The version number of the file org.el.")
 
+;;;###autoload
 (defun org-version (&optional here)
   "Show the org-mode version in the echo area.
 With prefix arg HERE, insert it at point."