a tiny bit of docs for PrettyDate

which maybe should be RelativeDate? or maybe even RelativeTime, because
it isn't concerned with dates at all. mhh...

elm/PrettyDate.elm

module PrettyDate (prettyDate) where
{-| Relative time formatting.
Supports both dates in the past and in the future.
 -}
import Date
import Date (Date)
{-| Format the second date relative to the first one. -}
prettyDate : Date -> Date -> String
prettyDate reference date =
    let referenceSeconds = Date.toTime reference