v6.0 merge with 2pc, beta, not working
v6.1 modify client in according to server
v6.2 merged with modified server, server use in lockqueue as acquired time
v6.21 bug
Merge branch 'master' of https://github.com/zagfox/cse223p into tripod

Conflicts:
	lockstore/logplayer.go
v6.3 add msgclientfactory
merge
Merge branch 'master' of https://github.com/zagfox/cse223p into tripod
v6.3.1 add new in msgfactory
merge
Merge branch 'master' of https://github.com/zagfox/cse223p into tripod
???