Update to Elm 0.19

[4onen]

So I saw issue #8 and may have gotten carried away. I believe everything works except examples/Search.elm and examples/SearchMarkers.elm. Both relied on labzero/elm-google-geocoding, which hasn't been updated yet. (Might make that my next project.)

It's not ready for immediate release; I had to mess with the JSON a bit by hand and I'm unsure whether BSD3 and BSD-Clause-3 are the same license (elm make wouldn't accept "BSD3" in the license field) but, apart from that it seems to behave exactly as before.

I had to floor some floats in replacing Window.resize, so examples/Fullscreen.elm isn't one-hundred-percent fullscreen anymore. It's a dirty hack that could probably be fixed as a beginner issue.