0.18: checking removes files automatically?

[Andrew Voznytsa]

> 
> IMHO, I think it is necessary to mark the file as *missing* (as
> it used to?) and not allow a commit unless the file was explicitly bzr
> rm'ed or bzr reverted. (eg. uncommitted changes in working tree ...)

IMHO, if any change is need at all, --rm-missing option might be added to
allow users commit changes set with missing files. Plus auto-rm-missing
=on/off in bazaar config for these who likes old behavior.