first whack at less 'glue all the bits together a billion times'-validator; probably slower right now, but should be easier to speed up long term
removing deferred branch validation; doesn't work under current scheme, may be re-addable later
tuning test rates down while attacking correctness (before performance)
moving some code around
stopgap commit for last failing tests; error detection works, but reporting is null-er-ific
all tests pass, error reporting and perf still need work
fixing pre-4.0 builds / tuple references
minor speed up
serious speed up by pruning unnecesarry rooted verifiers
removing dead code