Merge branch 'master' of https://github.com/goraft/raft
Merge branch 'master' of https://github.com/goraft/raft
refactor(server.go) Leader do not need to send its own response of receiving a command to itself.
We send response to itself before, since it is a simple way to deal one machine cluster. After a little modification, we do not need to do this anymore.
do not make map twice
Merge pull request #152 from xiangli-cmu/refactor_processCommand

Refactor process command