Changes

* [https://github.com/mozilla/openbadges/wiki/Assertions Badge Assertion aka Badge Manifest] - Earner identity information (<algorithm>$<hash(email + salt)>) plus badge information (JSON metadata)

* Verified Badge - Badges that have an assertion URL. OBI currently supports verification of badges through Hosted Assertions. i.e. When Issuer pushes badge to the OBI, metadata is pushed to a unique and persistent url aka assertion url. Issuer maintains Badge Assertion and Displayers can ping the assertion URL to confirm verification.

* Endorsed Badge - Badges that have been signed by a third party/endorser. The Backpack verifies the signature against the signer’s public key and if confirmed, accepts the badge as an endorsed badge. The endorsement information is represented with the badge as a layer of trust on the badge’s validity.

== D. Backpack ==