add jquery and grid.
Merge branch 'feature/backlog-front' of https://github.com/tingwang/scrubo into feature/backlog-front

* 'feature/backlog-front' of https://github.com/tingwang/scrubo:
  Add nofity and flash.
  Add loading icon after click button.

Conflicts:
	front/app/index.html
	front/app/scripts/app.js
	front/app/styles/main.css