Move GetTotalHandler into handlers.py, add tests.

Also updates the memcache entry for the total at pledge time, so the
progress bar should update pretty much instantly!
Fix broken privacy link
Stop the spinner on error
Use new /r/total handler in embed.html.
Add pledge_type field to Pledge.

Indicates whether the pledge is conditional or not. Currently, it's
always conditional.
added redirect handler
Merge branch 'master' of https://github.com/MayOneUS/app-engine into email-signup

Conflicts:
	backend/handlers.py
	backend/util.py
redid changes after merge conflict
import logging
fix typo
add email to user-info api
Merge branch 'master' of https://github.com/MayOneUS/app-engine into email-signup
fixes
remove redirect from /subscribe since it's handled in the front end
fix