First draft: Configuration struct (not used yet)
WIP
TestConfigurationDecode
Implement proper C_old,new election semantics
Update README about joint-consensus API rationale
Add more thorough rationale for joint-consensus
Fix typos in JOINT-CONSENSUS.md
Fix semantics of configuration changes in non-leaders
Servers expelled from the network should shut down
Clarify: servers not present in a configuration can't (don't) vote in that configuration
Clarify JOINT-CONSENSUS.md rationale
Merge pull request #2 from peterbourgon/joint-consensus

Joint consensus