authexec: boneyarding

Technically, this is actually being moved to Misty’s fork, but I guess
to follow up the tap_migrations we should move this here anyway.

Closes #31.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
abiword: modernize autotools deps
iulib: modernize autotools deps
mlkit: modernize autotools deps
urweb: modernize autotools deps
README.md: general updates, cleanup.