docs(quickstart): show qs files via code-tabs for Dart (angular#2839)

Author: chalin

public/docs/dart/latest/quickstart.jade

@@ -46,11 +46,6 @@ block create-your-app
   :marked
     Let's create a folder to hold our application and add a super-simple Angular component.
 
-block annotation-fields
-  :marked
-    The call to the `@Component` constructor has two
-    named parameters, `selector` and `template`.
-
 block create-main
   p.
     Now we need something to tell Angular to load the root component.
@@ -196,6 +191,8 @@ block project-file-structure
       other directories and dotfiles.
 
 block project-files
+  :marked
+    Try the <live-example></live-example>, or view the files here:
   +makeTabs(`
       quickstart/ts/app/app.component.ts,
       quickstart/ts/app/main.ts,

public/docs/ts/_cache/quickstart.jade

@@ -5,7 +5,6 @@ block includes
   - var _angular_browser_uri = '@angular/platform-browser-dynamic'
   - var _angular_core_uri = '@angular/core'
   - var _stepInit = 4 // Step # after NgModule step
-  - var _quickstartSrcURL='https://github.com/angular/quickstart/blob/master/README.md'
 
 //- TS/Dart shared step counter
 - var step = _stepInit
@@ -43,7 +42,7 @@ h1 Build this application!
   - [Step !{step++}](#index): Define the web page that hosts the application.
   - [Step !{step++}](#build-and-run): Build and run the application.
   - [Step !{step++}](#make-changes): Make some live changes.
-  - [Wrap up and Next Steps](#wrap-up)
+  - [Wrap up and next steps](#wrap-up)
 
 - var step = _stepInit // reinitialize step counter for headers to come
 
@@ -360,8 +359,10 @@ block project-file-structure
       .file styles.css
       .file systemjs.config.js
       .file tsconfig.json
-:marked
-  To see the file contents, open the <live-example></live-example>.
+
+block project-files
+  :marked
+    To see the file contents, open the <live-example></live-example>.
 
 .l-main-section
 :marked

public/docs/ts/latest/quickstart.jade

@@ -42,7 +42,7 @@ h1 Build this application!
   - [Step !{step++}](#index): Define the web page that hosts the application.
   - [Step !{step++}](#build-and-run): Build and run the application.
   - [Step !{step++}](#make-changes): Make some live changes.
-  - [Wrap up and Next Steps](#wrap-up)
+  - [Wrap up and next steps](#wrap-up)
 
 - var step = _stepInit // reinitialize step counter for headers to come
 
@@ -359,8 +359,10 @@ block project-file-structure
       .file styles.css
       .file systemjs.config.js
       .file tsconfig.json
-:marked
-  To see the file contents, open the <live-example></live-example>.
+
+block project-files
+  :marked
+    To see the file contents, open the <live-example></live-example>.
 
 .l-main-section
 :marked