0.8.4.27:

0.8.4.27:
	OK, here's the deal.
	... *MODULE-PROVIDER-FUNCTIONS* no longer call PROVIDE.  It's
		now the job of user code to do that (as it probably
		should always have been.
	... OK, so as a result, our one-file contribs now need to
		PROVIDE themselves.  Make it so.
	... fix asdf-install/asdf autorequiration; an installed sbcl
		can now require asdf-install (as well as all the other
		asdfized contribs) as the first command in a clean core
	... update contrib/{README,STANDARDS} to match what we currently
		do.