Fix the XSS related to collections creation (bug 1092523)
Merge pull request #11 from mozilla/1092523-xss-collection-choices

Fix the XSS related to collections creation (bug 1092523)
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)
Tests and travis fixes