Merge pull request #18 from fengjingchao/inst

name change to go-distributed
finish testing acceptedProcess, all covered
Merge branch 'inst' of https://github.com/fengjingchao/epaxos into dev
Merge pull request #19 from yifan-gu/dev

tests for accepted process
add some tests for preAcceptedProcess, need more
add tests for preAcceptedProcess, completed, add `update seq' in handlePreAcceptReply
Merge branch 'dev' of https://github.com/yifan-gu/epaxos into inst
add initInstance and updateInstance and refine test