2.0.0

Add new zones from Turtle WoW 1.18.1 (#1)

New zones: Moonwhisper Coast, Timbermaw Hold, Timbermaw Tunnels,
Windhorn Caverns. Also fixes a couple of stale overlay names
(darnassis -> darnassus, ogrimmar -> orgrimmar) and a trailing
space in Northwind's name. mapId numbering shifts to make room for
the new zones, so instance ownerMapId references were updated to
match.

1.0.0

better instructions, simplified artifact