in progress
Merge branch 'dev' into recovery
add RecoveryInfo
Merge pull request #35 from fengjingchao/recovery

Recovery
Update README.md
Update README.md
1. changed receiver's behaviour in terms of ballot, now it returns its own ballot; 2. write something about recvPrepareReply.
Merge branch 'dev' of github.com:go-epaxos/epaxos into dev
Merge pull request #36 from yifan-gu/dev

1. changed receiver's behaviour in terms of ballot, now it returns its o...
doc for Nil Status
Merge pull request #39 from fengjingchao/doc

doc for Nil Status