Revert to using status for kw-commands
cmdutil.bail_if_changed has to call status stat'ing working dir.
This renders the whole walk experiment mute, duh.
On the upside kwexpand/kwshrink can be applied to selected clean files,
while there are local changes in other files.
bail_if_changed compatibility wrapper not needed anymore.
syntax: glob
*.pyc
*.pyo
*~
*.swp
*.orig
*.rej
build/*
MANIFEST