fix doc on prepare reply
Merge branch 'master' of github.com:go-epaxos/epaxos
add info and recovery info in new instance
add original ballot in prepare message
before merge
change starting epoch to 1 and renew entering new states.
add some tests for acceptedProcess
after merge
100% coverage for /data
set new instance's status to nilstatus
Merge pull request #17 from fengjingchao/inst

Fix ballots in prepare with Yifan