Add basic authentications (pending test coverage) and a plugin architecture.
Implemented full-featured authentication and user signup/login flow using JWT and pbkdf2.  Tests still pending.
Implement password reset and authentication test suite
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Also test explicit password resets.
Add tests for unauthenticated password-change attempts.
Merge branch 'dev'
Put basic authentication documentation in the readme, make the JWT secret configurable and secure by default.