New URLs for legal & privacy links (bug 1005598)
Merge pull request #348 from davidbgk/1005598-change-mozilla-urls

New URLs for legal & privacy links (bug 1005598)
Integrated lib/crypto from zamboni. (bug 1070189)
Sign addon files during review process (bug 1070189)
Management command to sign addons (bug 1070191)
Needs some more love
Renamed most of "app" terms to "addon" (bug 1070189)
Travis fix