* Retry most network failures in RegistrationCoordinator
* Update the way we identify network errors to be more flexible
* Retry remaining requests
* Automatically retry registration requests if time intervals are short
* fix error types not compiling on kbs
* Add test for reg recovery password reg with retries
* fix extra t
* Interpret nil nextVerificationAttempt as a code not having been sent yet, not as no code able to be submitted
* Update request and submit verification code handlers to latest server spec
* Update CreateAccountResponse codes to match server spec
* Update ChangeNumberResponse codes to match server spec
* Rename some cases for clarity, propagate up network errors vs generic errors
* pr comments
* Add ability to compute registration recovery password
* Add RegistrationCoordinator
* remove repeat nav controller that evan added
* Scaffolding for RegistrationCoodinator test
* Add first round of RegistrationCoordinator tests, some stuff I needed to get them working, and some fixes to RegistrationCoordinator itself I discovered thanks to the tests
* switch to owsFailBeta
* Add auth credential candidate flow tests, related fixes and additions to coordinator and friends
* Add tests for session based registration path and associated fixes
* PR comment nits
* Add RegistrationSession object
* Add RegistrationSessionManager protocol
* Add skeleton RegistrationSessionManagerImpl - just kvstore persistence implemented
* Issue requests in RegistrationSessionManagerImpl
* let tests access the in memory kv store
* Add TSRequestOWSURLSessionMock. Rename OWSURLSessionMock
* Add DateProvider
* Take a dateProvider in RegistrationSessionManagerImpl
* Add tests for RegistrationSessionManager
* pre-emptively update timeout for tests. will remove once promise Scheduler code is merged
* PR comments
* Use Schedulers
