Optimize mediawords_update_processed_stories.pl
Stash auth_user db table row.
Require tag_set name to be email address.
Merge branch 'RELEASE_20140325' of https://github.com/berkmancenter/mediacloud into RELEASE_20140325
Merge branch 'RELEASE_20140325' of https://github.com/berkmancenter/mediacloud into RELEASE_20140325
Add pgcrypto extension.