settings known to xcvb or the individual value of a single one.
Change the default object-directory location to be
	$HOME/.cache/xcvb/common-lisp/<lisp-implementation-version>/
Added format! in driver.lisp to help with debugging and forcing output.
Debugged CMUCL support in driver.
Fixed implementation-identifier support in extract-target-properties.
Allowed Makefile in example-1 to parameterize on lisp implementation.
Refactored how option-specs are specified for command line options.
Removed dead code paths from simple-build backend that dealt with
	"xcvb.mk" and the makefile output file.
Muffled warnings when loading asdf.
Added target-asdf-version setting which you can query with show-settings.
Started DONE.rest

since ASDF was running the old uninterned perform method while ironclad was
adding its :around method to the new ASDF perform symbol and generic function
that is not active yet.

Try to be less dumb when deciding whether to use enough-namestring.

Conditionalize away the xcvb farmer to not depend on iolib.

* Disable testing of POIU with clisp by default (some else waits for our children, apparently).
* play nicer with mlisp (?)
* remove duplicate defgeneric
* FAQ about comparison with ASDF

Some documentation update.
Tweak hello Makefile for ASDF 2.
re-Hush warning from registry.
Add require-asdf.