v0.0.1-alpha.9.1

New:

Implements error types properly. There are following error types available now:

• CDCError: wraps CDCErrorPB
• ConsensusError: wraps ConsensusErrorPB
• MasterError: wraps MasterErrorPB
• PerOpError: wraps PerOpErrorPB (requires tests)
• RemoteBootstrapError: wraps RemoteBootstrapErrorPB
• TabletServerError: wraps TabletServerErrorPB

Built-in default client implementation handles those so there is no need to check if the response payload has an Error.