Activate angularjs
Create Project controller and service of AngularJS
Support AngularJS
Implement MoveHigher and MoveLower on AngularJS
Refine some design
Add anchor for project_dashboard_path for AngularJS
Design fix and support reordering project_tasks
Change the layout a little
Implement removing items
Merge branch 'master' into angular

Conflicts:
	Gemfile.lock
Make confirmation dialog on destroy work well
Implement copy items on AngularJS
Implement updating remarks
Fix the problem that remarks cannot be retrieved for category
Refine style
Toggle the sorting arrows for the first or last item
Remove unnecessory file
Change controller name for dashboard in AngularJS
Make contenteditable selected on focus
Make some ng-if to ng-show/ng-hide

This change is done because these elements have only to be hidden as needed not deleted