* slime-autodoc.el, slime-c-p-c.el, slime-compiler-notes-tree.el,
	slime-enclosing-context.el, slime-fancy.el, slime-fuzzy.el,
	slime-hyperdoc.el, slime-mdot-fu.el, slime-mrepl.el,
	slime-parse.el, slime-presentations.el, slime-repl.el,
	slime-snapshot.el, slime-tramp.el, slime-xref-browser.el:

	Use newly added `define-slime-contrib' macro to specify
	slime and swank dependencies, and to specify what should happen on
	contrib load/unload.