Committing the island generator script, and a bugfix

region_api.cpp had a bug, where a glue function's name was used twice. It
was an easy catch, but there was an issue in the new script, where I was
counting from 0 instead of 1. As a result, I was chasing a segfault for 5
hours.

common/map/region_api.cpp

@@ -87,7 +87,7 @@ static int onUnload(lua_State* L) {
 
 static const luaL_Reg regionLib[] = {
 	{"SetTile",setTile},
-	{"SetTile",getTile},
+	{"GetTile",getTile},
 	{"GetX",getX},
 	{"GetY",getY},
 	{"GetWidth",getWidth},