script to set a single directory to an "install" dir

better to add directories to etc/pkgusr/install_dirs and
just re-run that often, but on slow machines being able
to do a single directory quickly is sometimes nice.
add optional bash_profile lines (commented out)
added some extra install_dirs
add comment to add "/lfs" to prune_frefixes if host and target have different package user ids
only try to apply files as patches, not directories

like "." and ".."
add optional tidy and .project annotation to build (commented out)