Make batch size configurable.
Merge pull request #186 from EasonLiao/config_batch_size

Make batch size configurable.
Remove round robin election.
Merge pull request #184 from EasonLiao/remove_round_robin

remove round robin election
Merge pull request #188 from EasonLiao/doc

Some changes on doc.
Change quorumSet to quorumMap.
Merge pull request #192 from EasonLiao/fix_name

Change quorumSet to quorumMap.
Update documentation.