add tests to connect Accept and Commit, put ugly stuff in one helper func
delete ballot in Commit, add silly log
Merge pull request #13 from fengjingchao/dev

before finishing preaccept reply
Merge branch 'dev' of github.com:go-epaxos/epaxos into dev
add updating MaxInstanceNum when receiving accept and commit
Merge pull request #14 from fengjingchao/dev

fix makeLargerBallot
Merge pull request #12 from yifan-gu/dev

add tests to connect Accept and Commit, put ugly stuff in one helper fun...
prepare prototype and a few other fixes