Use URL scheme for Apple Maps

[Kilian Koeltzsch]

Not sure if this would be preferable or not, but it's possible and looks to support everything necessary.
http://maps.apple.com/?[...]

More here: https://developer.apple.com/library/content/featuredarticles/iPhoneURLScheme_Reference/MapLinks/MapLinks.html

Upside would be to have everything consistent. But it looks like it still isn't possible to detect an "uninstalled" Maps.app 😕 But that problem already exists, see #3