[WIP] Badgekit-API integration

This is a mostly working version of openbadges-badges that talks to the new badgekit-api instead of openbadger.  It still uses aestimia for assessment, however (until badgekit's front end assessment stuff is finished).

This cannot yet be deployed, as the claim code functionality does not yet work.  Some badgekit-api changes are necessary to get this working.