change screenshot
refactor update data function into courserService
move common services in /src/common
Merge branch 'refactor_bg'
new feature, update minor version
fix spelling error
fix badge status
Merge pull request #27 from xupeixiang/master

Fix the badge text
new contributor @xupeixiang
hot-fix the date parsing problem, use momentjs and specify data format
version bump
update to v0.2.1