Extract image GPS coordinates on the client side.

This is so setting a location via image GPS coordinates will
continue to work when images are resized on the client side
in order to speed up uploads. (#566)
Rebuild production JS file. (#566)
Resize images before uploading.

Cut down the image on the client side in order to speed
up image uploads and especially avoid timeouts, which
occur with large images that take many seconds. (#566)
Rebuild production JS file. (#566)