[#14] users - mongo storage
[#15] admins - mongo storage
Merge branch 'develop' into feature/m2-mongo

Conflicts:
	README.md
	app/controllers/Authentication.scala
	app/controllers/UserController.scala
	app/controllers/Users.scala
	app/controllers/Visitors.scala
	app/controllers/admins/AdminController.scala
	app/controllers/admins/Admins.scala
	app/controllers/admins/Authentication.scala
	app/controllers/admins/Users.scala
	app/models/Identifiable.scala
	app/models/requests/RequestCRUD.scala
	app/services/AdminService.scala
	app/services/UserService.scala
	app/utils/binders.scala
Merge branch 'feature/m2-mongo' into develop