Returns the contents of 'pyglass/lib' as a list of 'lib/*' items for package_data

def lib_list():
  ''' Returns the contents of 'pyglass/lib' as a list of 'lib/*' items for package_data '''
  lib_list = []
  for (root, dirs, files) in os.walk(Dir.LIB):
    for filename in files:
      root = root.replace('pyglass/', '')
      lib_list.append(join(root, filename))
  return lib_list