Gaia GPS iOS v10.4

This update does it all: adds features, improves the UI, and fixes bugs.

Auto-Naming

auto-naming - tracks, routes, waypoints, maps, and photos are automatically named based on where they occurred - no more “My Track” and “My Photo” default names

the menus where you choose map sources and add map sources have been improved
map sources in your list now use an icon based on the exact map - different for each
you can now view a details screen about map sources in the app - includes a demo map, zoom range, description, and attribution
added a description for each map source - have fun browsing tons of maps of the world and history
remove default sources - you can now remove even default sources the app starts with, and customize your map layers perfectly (many people have requested this)
manage imported sources - view/add/remove sources you imported via the Add Map Sources screen too

create areas, measure area and perimeters, download maps based on areas, import areas from KML
look up elevation for tracks - Now you can replace elevation data on a track with data from a digital elevation model. This is useful for imported tracks, and for tracks with bad elevation data due to poor GPS reception.

exported photos now have good filenames, in photos and zip exports
fixed a bug where after guiding, stats on the map were laid out badly
of all the unlikely crashes in Gaia GPS, this release should fix about half of them, and we expect what was once a stable app, is now even stabler