Add support for SLIME in the VM.

That allows controlling the Common Lisp SBCL process that runs in the
debian VM from the host Emacs interactive environment.
Re-implement `make status` in lisp.

That allows matching version numbers in sid (given by rmadison) with
local debian/changelog first entry. Doint in shell wasn't a good use of
anyone's time given that source package names and directories are not
kept in sync.

The directory name is in sync with the Quicklisp release name.