Get the original version in the header of LIBRARY.
The original version is stored in the X-Original-Version header.
This header is added by the MELPA package archive to preserve
upstream version numbers.
LIBRARY is either a symbol denoting a named feature, or a library
name as string.
If SHOW is non-nil, show the version in the minibuffer.
Return the version from the header of LIBRARY as list. Signal an
error if the LIBRARY was not found or had no X-Original-Version
See Info node `(elisp)Library Headers' for more information about library headers. (fn LIBRARY &optional SHOW)