Fix #29

GetAllNodes also go through the consistency process

Update README.md

update pink to v3.0.6

update slash to v1.2

improve redis protocol

fix RequestVote bug. the leader will not become follower when network…

… partition, and the candidate's log is smaller than leader but the candidate has larger term

update tools

the protocol correctly version

update pink to v3.0.4

update rocksdb to v5.0.1