Update generate append entries to include Previous Log Term
Followers will correctly commit to a log entry.
Include examples in travis ci config.
Refactors broadcast in append entries.
Merge branch 'master' of github.com:dev-urandom/graft
Merge pull request #24 from wjdix/master

Makes stuff more better.
Merge pull request #25 from benmills/master

Pull out a cluster to make integration tests easier.
WIP
Adds methods to cluster to specify state machine and heal partitions in cluster.
Adds methods to cluster to specify state machine and heal partitions in cluster.
Merge pull request #26 from wjdix/master

Adds some additional convenient methods to cluster.
Rollback append entries messages to catch remotes up.
Merge pull request #27 from wjdix/wip

wjdix:wip