remove examples/mojo_ajax/items.db

$ sqlite3 examples/mojo_ajax/items.db
examples/d2/angular_v2_add_item.html
<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport"
     content="width=device-width, initial-scale=1, user-scalable=yes">
  <script src="../angular/angular.min.js"></script>
  <script src="angular_v2_add_item.js"></script>
  <link rel="stylesheet" href="style.css" type="text/css" media="print, projection, screen" />
  <title>List items</title>
</head>
<body>

<script>
</script>
<div ng-app="DemoApp" ng-controller="DemoController">
    <input ng-model="text"><button ng-click="add_item()">Add</button>

    <div id="error" ng-show="error">{{error}}</div>
</div>
</body>
</html>

examples/d2/angular_v2_add_item.js
angular.module("DemoApp", [])
.controller("DemoController", ['$scope', '$http', function($scope, $http) {
    $scope.add_item = function() {
        $scope.error = '';
        $http.post('http://127.0.0.1:3000/api/v2/item', {text: $scope.text} ).then(
            function(response) {
                console.log(response);
                $scope.result = response.data;
                //console.log($scope.items);
            }, function(response) {
                console.log("error", response);
                $scope.error = response.data.text;
            }
        );
        $scope.text = '';
    }
    $scope.error = '';
}]);