List.js minor bugfixes (followup)
List.js minor bugfixes (followup)

put foldl back as was + add type sig. to indicate why
replace use of xs.ctor with direct comparison against Nil.  This means the ctor field is no longer required (which is nice).

move .ctor in stor to the actual variable (doh)

5outh/Elm,Axure/elm-compiler,laszlopandy/elm-compiler,mgold/Elm,pairyo/elm-compiler,JoeyEremondi/elm-pattern-effects,deadfoxygrandpa/Elm