keep tree clean between checkouts with 'git rm'
keep tree clean between checkouts with 'git rm'

'git update-index --force-remove', that we used
so far, affects only the index. git rm also deletes
the working directory copies avoiding cruft in
working dir, too.

Also take care to find out the exact set of unneeded
files as we don't want to do unneeded changes in the
working dir.

csabahenk/git-review-branch