[emacs] Make C-h *be* backspace.

Some modes overwrite binding for backspace which leaves C-h pointing
to delete-backward-char which in such mode may be inappropriate and
different from what backspace dose.  So just translate C-h into
backspace.
[emacs] Drop smart-space in favour of cycle-spacing.

My patch implementing cycle-spacing has been included in bzr version
of Emacs so there's no longer need to carry it's implementation in
init.el.
[emacs] Remove old compatibility code and comments.
[emacs] Refactor mn-xml-configure-bindings.
[emacs] Remove some functions and bindings I've never used.
[sawfish] Add bindings for growing, shirking, yanking and packing.
[statuses] Replace “...” with Unicode ellipsis.
[statuses] New link.