message: add norwegian stemmer
diff: @@ -15,6 +15,7 @@ pub enum Language {
  Greek,
  Hungarian,
  Italian,
  + Norwegian,
  Portuguese,
  Romanian,
  Russian,
  @@ -38,6 +39,7 @@ impl Language {
  Greek => Algorithm::Greek,
  Hungarian => Algorithm::Hungarian,
  Italian => Algorithm::Italian,
  + Norwegian => Algorithm::Norwegian,
  Portuguese => Algorithm::Portuguese,
  Romanian => Algorithm::Romanian,
  Russian => Algorithm::Russian,
  