Merge pull request #1 from dianping/master

merge
Merge pull request #2 from dianping/master

merge
app code :1 finish normal flow , 2 finish roll flow, 3 unfinish recovery flow
app code : delete a deprecated class
add .gitignore
Merge branch 'master' of ssh://github.com/cltlfcjin/blackhole
ignore again
Merge branch 'master' of ssh://github.com/cltlfcjin/blackhole
test