Code review comment for lp:~lifeless/bzr/check-1

I've stopped working on check while the current progress is reviewed.

I'll go through and look at the issues you've noted.

With regard to the API changes, I can document Branch.check, as it is
conceivable that people have used it. WT._check is private;
InventoryEntry.check is also private by virtue of requiring a check
object - it can only be used from within check.

-Rob