Move in two functions from there that don't deserve being in asdf/driver.

and more compatible with new racket-like scribble syntax,
that doesn't do preprocessing on string.
Have exscribe.asd depend on fare-memoization, no longer provided by fare-utils.

Simplifiy a few things using utilities from asdf and xcvb.

update Makefile

individualized :build-depends-on and setup fullname canonicalization.