make hg add of a removed file unremove the file
if a file was removed, hg add shouldn't mark the file
as added, but as normal
see issue683
error: pretxncommit.nocommits hook failed: no commits allowed
transaction abort!
rollback completed
abort: no commits allowed
error: pretxncommit.nocommits hook failed: no commits allowed
transaction abort!
rollback completed
abort: no commits allowed