Merge pull request #7 from zhuzhaolong/Kenshin:dev

bugfix in propagate
update performance test to combine 40 metrics
add basic metric echo service
Merge pull request #8 from zhuzhaolong/Kenshin:dev

add basic metric echo service
add ci
Merge pull request #9 from zhuzhaolong/Kenshin:dev

add ci
update readme