doc(test_plan.md)

change naming, from receiver to proposer.
Merge pull request #54 from yifan-gu/livetest

doc(test_plan.md)
livetest:

finish 3 replica, non-conflict, 1 proposer and 3 proposers
test partitial depency
Merge pull request #56 from yifan-gu/livetest

livetest:
chore(livereplica_test.go)

add livetestlibLogConsistent() to help check the log consistency amoung replicas
Merge pull request #58 from yifan-gu/livetest

chore(livereplica_test.go)
finish 2 proposer conflict live test
add consistency in conflict test
Merge pull request #59 from fengjingchao/dev

finish 2 proposer conflict live test
feat(replica.go, instance.go, message.go)

use glog to print basic logs
Merge pull request #60 from yifan-gu/log

feat (replica.go, instance.go, message.go)
add live test
Merge pull request #61 from fengjingchao/dev

add live test