etcd: add consistent get
Merge pull request #60 from etcd-team/consistent_get

etcd: add consistent get
conf: remove GraphiteHost flag
etcdserver: use snapshotCount flag
etcdserver: rename someMachineMessage->machineMessage
Merge pull request #65 from etcd-team/renameMessage

etcdserver: rename someMachineMessage->machineMessage
wal: move record method to record.go
Merge pull request #66 from etcd-team/wal_refactor

wal: move record method to record.go
Merge pull request #63 from etcd-team/remove_GraphiteHost

conf: remove GraphiteHost flag
etcdserver: add a testSnapCount constant
Merge pull request #64 from etcd-team/snapflag

etcdserver: use snapshotCount flag
etcdserver: add TestBecomeStandbyByRemove
etcdserver: dispose wal and snap dir when removed
etcdserver: add TestBecomeParticipantBySync
etcdserver: improve based on comments