Routable garmin maps using mkgmap

[Lambertus]

@mtrax

looks like the wiki needs updating as alot of the new args for mkgmap are missing
I got the latest from --help
as there seems to be no documentation on some of these

Yeah, I tried to document what I knew but I’m surprised as well that there are so many other options. I guess that’s what you get when you never try the --help option