var TodoList = Backbone.Collection.extend({

    model: Todo,

    comparator: function(todo) {
        return todo.get('title');
    }

    });

    var TodoView = Backbone.View.extend({

    tagName:  "li",

    template: _.template($('#item-template').html()),

    initialize: function() {
        this.listenTo(this.model, 'change', this.render);
        this.listenTo(this.model, 'destroy', this.remove);
    },

    render: function() {
        this.$el.html(this.template(this.model.toJSON()));
        this.$el.toggleClass('done', this.model.get('done'));
        this.input = this.$('.edit');
        return this;
    }
    });