expose ability to enable remote multimedia download for apps
Merge branch 'master' into remote-mm

Conflicts:
	corehq/apps/app_manager/templates/app_manager/releases.html
disabled upload button when upload starts
remove old maps report and start scaffolding new one
import leaflet
loading test data and geojson
display geojson
bind detail popup
misc buildout
togglable metrics
don't reset viewport on metric change
build out presentation metrics like varying size, color, etc.
add ability to publish reminders to exchange
cleanup
handle data nulls and type errors
add documentation
support icon markers
dynamic dimensions on icon markers
cleanup
docs