docs(tutorial): use the angular/angular-phonecat#1.5-snapshot branch

Similar to what was done in 6234cda for the `v1.4.x` branch.
The tutorial will slightly change for v1.7.x (see
angular/angular-phonecat#430 for details), so this commit ensures the
tutorial for older versions (v1.5.x, v1.6.x) remains usable.

Author: gkalpak

docs/app/src/tutorials.js

@@ -14,8 +14,7 @@ angular.module('tutorials', [])
     scope: {},
     template:
       '<a ng-href="tutorial/{{prev}}"><li class="btn btn-primary"><i class="glyphicon glyphicon-step-backward"></i> Previous</li></a>\n' +
-      '<a ng-href="http://angular.github.io/angular-phonecat/step-{{seq}}/app"><li class="btn btn-primary"><i class="glyphicon glyphicon-play"></i> Live Demo</li></a>\n' +
-      '<a ng-href="https://github.com/angular/angular-phonecat/compare/step-{{diffLo}}...step-{{diffHi}}"><li class="btn btn-primary"><i class="glyphicon glyphicon-search"></i> Code Diff</li></a>\n' +
+      '<a ng-href="https://github.com/angular/angular-phonecat/compare/1.5-step-{{diffLo}}...1.5-step-{{diffHi}}"><li class="btn btn-primary"><i class="glyphicon glyphicon-search"></i> Code Diff</li></a>\n' +
       '<a ng-href="tutorial/{{next}}"><li class="btn btn-primary">Next <i class="glyphicon glyphicon-step-forward"></i></li></a>',
     link: function(scope, element, attrs) {
       var seq = 1 * attrs.docTutorialNav;
@@ -41,12 +40,11 @@ angular.module('tutorials', [])
       '<p><button class="btn" ng-click="show=!show">Workspace Reset Instructions  ➤</button></p>\n' +
       '<div class="alert alert-info" ng-show="show">\n' +
       '  <p>Reset the workspace to step {{step}}.</p>' +
-      '  <p><pre>git checkout -f step-{{step}}</pre></p>\n' +
-      '  <p>Refresh your browser or check out this step online: ' +
-          '<a href="http://angular.github.io/angular-phonecat/step-{{step}}/app">Step {{step}} Live Demo</a>.</p>\n' +
+      '  <p><pre>git checkout -f 1.5-step-{{step}}</pre></p>\n' +
+      '  <p>Refresh your browser to see the changes.</p>\n' +
       '</div>\n' +
       '<p>The most important changes are listed below. You can see the full diff on ' +
-        '<a ng-href="https://github.com/angular/angular-phonecat/compare/step-{{step ? (step - 1): \'0~1\'}}...step-{{step}}" title="See diff on Github">GitHub</a>.\n' +
+        '<a ng-href="https://github.com/angular/angular-phonecat/compare/1.5-step-{{step ? (step - 1): \'0~1\'}}...1.5-step-{{step}}" title="See diff on Github">GitHub</a>.\n' +
       '</p>'
   };
 });

docs/content/tutorial/index.ngdoc

@@ -77,7 +77,7 @@ Clone the [angular-phonecat repository][angular-phonecat] located at GitHub by r
 command:
 
 ```
-git clone --depth=16 https://github.com/angular/angular-phonecat.git
+git clone --depth=16 --branch=1.5-snapshot https://github.com/angular/angular-phonecat.git
 ```
 
 This command creates an `angular-phonecat` sub-directory in your current directory.
@@ -87,6 +87,11 @@ This command creates an `angular-phonecat` sub-directory in your current directo
   This makes the download much smaller and faster.
 </div>
 
+<div class="alert alert-info">
+  The `--branch=1.5-snapshot` option tells Git to pull down the `1.5-snapshot` branch.
+  The code for this older version of the tutorial is on that branch.
+</div>
+
 Change your current directory to `angular-phonecat`.
 
 ```
@@ -199,7 +204,7 @@ You can now browse to the application at http://localhost:8000/index.html.
 
 <div class="alert alert-info">
   To serve the web app on a different IP address or port, edit the "start" script within
-  `package.json`. You can use `-a` to set the address and `-p` to set the port. You also need to 
+  `package.json`. You can use `-a` to set the address and `-p` to set the port. You also need to
   update the `baseUrl` configuration property in `e2e-test/protractor.conf.js`.
 </div>
 
@@ -284,9 +289,9 @@ a new commit of changes to a remote repository.
 <br />
 **Firewall / Proxy issues**
 
-Git and other tools, often use the `git:` protocol for accessing files in remote repositories. 
-Some firewall configurations are blocking `git://` URLs, which leads to errors when trying to clone 
-repositories or download dependencies. (For example corporate firewalls are "notorious" for blocking 
+Git and other tools, often use the `git:` protocol for accessing files in remote repositories.
+Some firewall configurations are blocking `git://` URLs, which leads to errors when trying to clone
+repositories or download dependencies. (For example corporate firewalls are "notorious" for blocking
 `git:`.)
 
 If you run into this issue, you can force the use of `https:` instead, by running the following
@@ -304,17 +309,17 @@ In that case, you can delete the `node_modules/` directory and run `npm install`
 <br />
 **Protractor dependencies**
 
-Under the hood, Protractor uses the [Selenium Standalone Server][selenium], which in turn requires 
-the [Java Development Kit (JDK)][jdk] to be installed on your local machine. Check this by running 
+Under the hood, Protractor uses the [Selenium Standalone Server][selenium], which in turn requires
+the [Java Development Kit (JDK)][jdk] to be installed on your local machine. Check this by running
 `java -version` from the command line.
 
 If JDK is not already installed, you can download it [here][jdk-download].
 
 <br />
 **Error running the web server**
 
-The web server is configured to use port 8000. If the port is already in use (for example by another 
-instance of a running web server) you will get an `EADDRINUSE` error. Make sure the port is 
+The web server is configured to use port 8000. If the port is already in use (for example by another
+instance of a running web server) you will get an `EADDRINUSE` error. Make sure the port is
 available, before running `npm start`.
 
 <hr />

docs/content/tutorial/step_00.ngdoc

@@ -17,7 +17,7 @@ section.
 In the `angular-phonecat` directory, run this command:
 
 ```
-git checkout -f step-0
+git checkout -f 1.5-step-0
 ```
 
 This resets your workspace to step 0 of the tutorial app.