Decentralized convention support

[kwquick]

Current Thespian system bases (circa version 3.2) are implemented with a single convention leader and form a star topology. This makes the convention leader a single point of failure in the overall architecture. There should be a system base that implements a leadership election (perhaps using something like Raft or Paxos directly) so that the overall environment is tolerant of the failure of any individual system and handle network partitioning events.