def fs_status(dir)
    RevStatus.new(
      fs_rim_dirs(dir).collect { |d|
        build_module_status(dir, d) 
      })
  end
def fs_status(dir)
    RevStatus.new(
      fs_rim_dirs(dir).collect { |d|
        build_module_status(dir, d) 
      })
  end
status object for the current file system content of dir
 this can by any directory even outside of any git working copy