Added decodeBoolean, encodeBoolean, decodeList, encodeList, decodeNumeral and encodeNumeral
Parameter order in foldr reducing function has flipped to list element followed by accumulator to match haskell
foldr :: Foldable t => (a -> b -> b) -> b -> t a -> b
foldl :: Foldable t => (b -> a -> b) -> b -> t a -> b