Remove superfluous and now erroneous TRAVERSE methods.
Work towards getting ready for the next ASDF.
Use asdf-driver, not asdf-utils anymore.
Have xcvb-driver just use asdf-driver. remove xcvb-utils. Make lisp-invocation work.
Minimal changes to compile in the new asdf 2.27 world.
run-program/ is now run-program. Update.
Minimally adapt xcvb to the latest ASDF 2.26.141.
0.600: it's ASDF3, not ASDF2.27. Make XCVB work that way.
Make XCVB compile with ASDF 2.26.169.
Some changes for the latest ASDF.