Added Editing function (have a problem that can't applying )

https://egghead.io/lessons/angularjs-building-an-angular-app-temporary-state-for-editing-an-object-with-ng-model-and-a-controller

https://github.com/eggheadio/egghead-angularjs-from-scratch-getting-started/blob/06-editing-bookmark/index.start.html