mention npm installer
mention npm installer
jvoigtlaender/elm-lang.org,frankschmitt/elm-lang.org,FranklinChen/elm-lang.org,FranklinChen/elm-lang.org,frankschmitt/elm-lang.org,jvoigtlaender/elm-lang.org,amitaibu/elm-lang.org,amitaibu/elm-lang.org