More testing progress, combined dir/commit traversal

Passing more tests now with the journalling change, but still have more
work to do.

The most humorous bug was a bug where during the three step move
process, the entry move logic would dumbly copy over any tags associated
with the moving entry, including the tag used to temporarily mark the
entry as "moving".

Also combined dir and commit traversal using a "stop_at_commit" flag in
directory struct as a short-term hack to combine the code paths.

Author: geky