0.5.0

• Introduced an experimental Joint Consensus based arbitrary membership change feature. (#101)
• Harmonized protobuf dependency to match important downstreams. (#181)
• Unified the Progress collections inside ProgressSet. (#108)
• Raft::new() now returns a Result. (#122)
• Removed the Progress.is_learner field. Check via function in ProgressSet instead. (#119)
• Added Appvevor. Added then removed bors. (#137, #134)
• Introduced getters and setters for various Ready fields. (#120)
• Reduced memory allocation on reset. (#130)
• Added issue templates, more links. (#133, #126)
• Moved poll and quorum checking functionality into ProgressSet. (#121)
• The leader is now trivially in the replicate state. (#146)
• Fixed a problem with lease based read-only requests interacting with check_quorum wrong. (#141)
• Corrected the single_mem_node example. (#162)
• Fixed typos. (#159)
• Adopted Hashbrown over FxHash. (#160)
• Corrected learner checking in handle_transfer_leader. (#165)
• Resolved some lints (#174, #168, #142, #124)
• Fixed uses of #[feature(_)] so that we can build on stable cleanly. (#180)