extracted parsing of ChangelogState
extracted parsing of ChangelogState

shuhaowu/gh-ost,groenewold-pythian/gh-ost,groenewold-pythian/gh-ost,shuhaowu/gh-ost,druud62/gh-ost,druud62/gh-ost,wfxiang08/gh-ost,wfxiang08/gh-ost