Hi Guix,

In my effort to use strictly guix for my emacs package management, I
found that proof-general was not working out of the box with guix.el.

In the end I could not figure out how to make it work, but I did update
proof-general to 4.4 and updated the home-page.

proof-general puts its initialization file in
%outputs/share/emacs/site-lisp/site-start.d/pg-init.el. I also see
Tuareg puts the file there. Niether that path, nor any subdirectory of
site-lisp is included by $EMACSLOADPATH or is autoloaded by guix.el.

For the record, I added
(load-file "~/.guix-profile/share/emacs/site-lisp/site-start.d/pg-init.el")
to init.el as a workaround.

Anyways, this should fix proof-general to work with the current version
of coq at least and add some more newer niceties in recent versions.

Thanks, as always!

John