Update tutorial documentation step_00.ngdoc

Request Type: docs

How to reproduce: 

Component(s): 

Impact: small

Complexity: small

This issue is related to: 

**Detailed Description:**

As a developer learning AngularJS through `PhoneCat Tutorial App` on page `0 - Bootstrapping`, I'd like to see a code in tutorial's page in the same way like is coded within demo project. Tutorial uses `lib` and `css` folders for linking plugins instead of `bower_components`.

In Pull Request #6960 I fixed this small issue ;)

Cheers, Martin

### angular-phonecat/app/index.html

```html
  <link rel="stylesheet" href="../bower_components/bootstrap/dist/css/bootstrap.css">
  <link rel="stylesheet" href="css/app.css">
  <script src="../bower_components/angular/angular.js"></script>
```
### AngularJS: Tutorial: 0 - Bootstrapping

* Link: http://docs.angularjs.org/tutorial/step_00
* File: step_00.ngdoc

```html
  <link rel="stylesheet" href="css/app.css">
  <link rel="stylesheet" href="css/bootstrap.css">
  <script src="lib/angular/angular.js"></script>
```

and

```html
  <script src="lib/angular/angular.js">
```

**Other Comments:**

This change/branch was created directly through `improve this doc` button