show some initial datasets in view_exp for better UX
more stable verification and quicker api authorisation for superusers
Added optional settings for redis celery backend, added optional configuration and code for redis-tracked verification to avoid reverifying failed files too often
various bug fixes for backbone and redis dependencies
fixed backbone slowness, but still needs thumbnail-url-getter speedup
generic thumbnail url, pushing work to image request
fixed a bunch of server errors caused by improper exception handling
pep8 fixes, no functional changes
google analytics support
removed auth method chooser from login form
move metadata-images to a separate storage location set in settings.