Update installers
Update installers

@rtfeldman, I guess we should switch back to bintray, but I wasn’t sure
if it was already ready or what the file paths would be.

amitaibu/elm-lang.org,jvoigtlaender/elm-lang.org,frankschmitt/elm-lang.org,FranklinChen/elm-lang.org,jvoigtlaender/elm-lang.org,FranklinChen/elm-lang.org,frankschmitt/elm-lang.org,amitaibu/elm-lang.org