"add message fail and node fail to server"
Merge branch 'master' of https://github.com/kanitw/cse550-a2

Conflicts:
	PaxosServer.py
"fix the server"
Merge branch 'master' of https://github.com/kanitw/cse550-a2
fix client bug
Merge branch 'master' of https://github.com/kanitw/cse550-a2