Suggestion to gzip the Elisp source files

[Sven Joachim <sven_joachim@web.de>]

In GNU Emacs 22, Auto Compression mode is enabled by default. Therefore
and because of the growing number of packages coming with Emacs, it
makes sense to compress the Elisp source in the emacs<version>-el
package, saving probably some 25-30 Megabytes of disk space. Also, in
a way these files are documentation, and that is usually compressed in
Debian.

The only drawback is that Emacs won't find the Elisp source files if
the user disables auto-compression-mode; but I think few people will
want to do that.