chore(docs): restore old tutorial ngdoc files

docs/content/tutorial/step_06.ngdoc

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+@ngdoc overview
+@name Tutorial: 6 - Templating Links & Images
+@description
+
+<ul doc:tutorial-nav="6"></ul>
+
+
+In this step, you will add thumbnail images for the phones in the phone list, and links that, for
+now, will go nowhere. In subsequent steps you will use the links to display additional information
+about the phones in the catalog.
+
+
+<doc:tutorial-instructions step="6"></doc:tutorial-instructions>
+
+
+You should now see links and images of the phones in the list.
+
+The most important changes are listed below. You can see the full diff on {@link
+https://github.com/angular/angular-phonecat/compare/step-5...step-6
+GitHub}:
+
+
+## Data
+
+Note that the `phones.json` file contains unique ids and image urls for each of the phones. The
+urls point to the `app/img/phones/` directory.
+
+__`app/phones/phones.json`__ (sample snippet):
+<pre>
+ [
+  {
+   ...
+   "id": "motorola-defy-with-motoblur",
+   "imageUrl": "img/phones/motorola-defy-with-motoblur.0.jpg",
+   "name": "Motorola DEFY\u2122 with MOTOBLUR\u2122",
+   ...
+  },
+ ...
+ ]
+</pre>
+
+
+## Template
+
+__`app/index.html`:__
+<pre>
+...
+  <ul class="phones">
+    <li ng:repeat="phone in phones.$filter(query).$orderBy(orderProp)">
+      <a href="#/phones/{{phone.id}}">{{phone.name}}</a>
+      <a href="#/phones/{{phone.id}}" class="thumb"><img ng:src="{{phone.imageUrl}}"></a>
+      <p>{{phone.snippet}}</p>
+    </li>
+  </ul>
+...
+</pre>
+
+To dynamically generate links that will in the future lead to phone detail pages, we used the
+now-familiar {@link guide/dev_guide.compiler.markup double-curly brace markup} in the `href`
+attribute values. In step 2, we added the `{{phone.name}}` binding as the element content. In this
+step the `{{phone.id}}` binding is used in the element attribute.
+
+We also added phone images next to each record using an image tag with the {@link
+api/angular.directive.ng:src ng:src} directive. That directive prevents the browser from treating
+the angular `{{ expression }}` markup literally, which it would have done if we had only specified
+an attribute binding in a regular `src` attribute (`<img src="{{phone.imageUrl}}">`). Using
+`ng:src` prevents the browser from making an http request to an invalid location.
+
+
+## Test
+
+__`test/e2e/scenarios.js`__:
+<pre>
+...
+    it('should render phone specific links', function() {
+      input('query').enter('nexus');
+      element('.phones li a').click();
+      expect(browser().location().hash()).toBe('/phones/nexus-s');
+    });
+...
+</pre>
+
+We added a new end-to-end test to verify that the app is generating correct links to the phone
+views that we will implement in the upcoming steps.
+
+You can now refresh the browser tab with the end-to-end test runner to see the tests run, or you
+can see them running on {@link
+http://angular.github.com/angular-phonecat/step-6/test/e2e/runner.html
+angular's server}.
+
+# Experiments
+
+* Replace the `ng:src` directive with a plain old `<src>` attribute. Using tools such as Firebug,
+or Chrome's Web Inspector, or inspecting the webserver access logs, confirm that the app is indeed
+making an extraneous request to `/app/%7B%7Bphone.imageUrl%7D%7D` (or
+`/app/index.html/{{phone.imageUrl}}`).
+
+
+# Summary
+
+Now that you have added phone images and links, go to {@link step_07 step 7} to learn about angular
+layout templates and how angular makes it easy to create applications that have multiple views.
+
+
+<ul doc:tutorial-nav="6"></ul>