gistfile1.js

    app.directive('checkbox', function(){
        return {
            restrict: 'E',
            require: 'ngModel',
            scope: {
                options: '=',
                checked: '=ngModel',
                label: '=label'
            },
            /*jshint multistr: true */
            template: ' \
                        <label class="checkbox" ng-class="{checked: checked}"  ng-click="checked = !checked"> \
                            <span class="icons"> \
                                <span class="first-icon icon-check-empty"></span> \
                                <span class="second-icon icon-check"></span> \
                            </span> \
                            <input type="checkbox" ng-model="checked"/>{{ label }} \
                        </label>',
            replace: true
        }