summary of badges earned by users

Summary:
add badge_summary table to hive init

json_tuple explanation

Add badge summary generation to daily jobs

Some initial work to get this thing going. Let me know if you want this query to auto "heal" and how should I go about it.

Test Plan: badge summary is run daily in analytics pipeline

Reviewers: jace

Reviewed By: jace

Differential Revision: http://phabricator.khanacademy.org/D2511