Create BadgeClass

This is part of updating the badge system to v1.0.0.

Create three BadgeClass that represent the ones already used.

For information about the BadgeClass look at
https://github.com/mozilla/openbadges-specification/blob/master/Assertion/latest.md#badgeclass.
Create IssuerOrganization

Create a file that store the IssuerOrganization and add it address
into the BadgeClass.
Write script to update badges

For update `badge/some-type/some-badge.json`:

    $ python2 bin/badge-update.py -w badge/some-type/some-badge.json

For more options:

    $ python2 bin/bagde-update.py -h
Merge pull request #5 from r-gaia-cs/badgeissuer

Script to update badges