raft: prune unnecessary logging - fixes #15
Merge pull request #28 from bmizerany/lesslogging

raft: prune unnecessary logging - fixes #15
wal: prune repeative logging
Merge pull request #31 from etcd-team/prune-wal

wal: prune repeative logging
etcd: remove unnecessary StopProposalWaiters function
server: remove return value of func run
server: cleanup participant stop
etcd: we should trust people
etcd: cleanup locking in run
etcd: no more mutex
etcd: remove unused field seeds in participant struct
raft: refactor Campaign
raft/server: deny join if cluster is full
server: remove peer when size exceeds expected one
raft: filter out duplicate addNode and removeNode