new targets test-desktop and test-robot-desktop; update README
don't request geolocation during testem tests - fixes tests on iOS
make the leaflet map widget into an underlay
fix the IE console shim to be loaded before other code
Add source map generation to build phase.
move the back button from the map to the header; makes tests pass again
move all scripts to end of html for faster loading
hide flash of unstyled content on page load behind a splash screen