add delete confirm directive

add popover tips directive
disable button untill  action done(received data from server)
Merge branch 'master' of https://github.com/Coevery/Coevery

Conflicts:
	src/Orchard.Web/Modules/Coevery.Core/Scripts/app/adminapp.js
	src/Orchard.Web/Modules/Coevery.Core/Scripts/app/app.js
	src/Orchard.Web/Modules/Coevery.Core/Views/Content-List.cshtml