Completed front-end of my comment page
Fix timeline api
Merge pull request #429 from linzongshu/user

Completed front-end of my comment page
Merge remote-tracking branch 'upstream/user' into user
Merge pull request #430 from liuchuangww/user

Fix timeline api
Formulated identity APIs
Merge branch 'user' of https://github.com/pi-engine/pi into user
Merge branch 'user' into develop