[talk-au] Overland Track added

[Lachlan Rogers]

> Heh, I was wondering if that might happen. Anyway, I have a few gaps
> in it (mostly forgetting to turn the gps on after a break), so
> hopefully your trace will plug that. The biggest holes are around the
> waterfalls (after Du Cane Hut).

I think I have some decent traces from that area.  I was also
recording my GPS trace for geotagging photos.  I got right down to the
bottom of the D'Alton falls - but the canyon was so steep that I was
unable to lock onto any satellites from the bottom!

I'll try to add my traces to the map soon.

- Lachlan