Add migration for `under13` column in earner table.
Allow `under13` data to be stored with new users.
Whitespace
Migration, model & binary for generating issuer tokens.
Update middleware to use IssuerTokens.
Fix bug when sending in no metadata with user.
Remove default on `under13` field.
Fix confusing error message.
Make auth whitelists configurable.
Merge pull request #19 from mozilla/9-issuer-tokens

Implement issuer tokens [closes #9]
Merge pull request #18 from mozilla/10-underage-user-data

Store data about whether user is <13 [closes #10]
Migration for `badgeImages` table.
Fix migration, add model, add fixture.
Start writing tests for badge images.
Route for getting images.