Mustrack + Google maps V3

[hybrid]

I'm guessing that eventually google will deprecate the version 2 maps API that mustrack currently uses.
For this reason, I've been developing the code to be compatible with the maps V3 API.

Those of you who use Mustrack, please test with the V3 code here:

https://www.mustangtech.com.au/mustrackv3/

If all goes well, I will replace the original version with this one.