Rewrote debugging code.  Reorganized code.
Rewrote debugging code.  Reorganized code.

darcs-hash:20070430153751-a5408-ffe4f855a34544143466ef676fb0d6f11473d602.gz

DanielStutzbach/blist,pfmoore/blist,DanielStutzbach/blist,pfmoore/blist