Added Canadian and Mexican METARs/TAFs (Mexico data seems iffy, maybe its only valid during daylight hours ?)

In any case, for the 1211 database update the NavData should also include CA&MX data.

Thanks to http://www.ourairports.com/ for the data, if you find you’re missing some data please let them know and the same data will trickle down to SkyCharts.
Note: Only for CA/MX data, for now SkyCharts uses FAA data for CONUS/Alaska.