* changes:
AddReviewersOp: Get user and ReviewDb from context
Move ReviewerAdder and its dependencies out of restapi package
Rename PostReviewers{Op,Email} to AddReviewers{Op,Email}
Move most methods from AccountsCollection to AccountResolver
Factor a non-restapi GroupResolver out of GroupsCollection
Move common reviewer addition code out of PostReviewers
PostReviewersOp: Pass correct to/CC arguments to emailReviewers
AbstractNotificationTest: Improve readability of failure message
Add push tests for auto-adding forged identities as reviewers
Add tests for re-adding the same reviewers
Add notification tests for adding reviewer/CC by email
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