Commentary on isNil().
Fixed DirectAdd() result for LSet/LMax.
More quorum testing.
Renamed quorum to tally.
Use boolean OR correctly.
Implement LMap.Scan/DirectAdd/DirectMerge().
TestMultiTally().
Better MultiTally comment.
Shorter shortest path.
Reuse multi-tally abstraction in RAFT.
Use tally instead of nextVote.
No need for no-op Add()'s.