fix(Tutorials): Point back to angular 1.2.26

For some reason in 1.3 ngClass is refusing to change with $scope alerations on
the tutorials but it works fine outside of them. Probably has to do
something with grunt-ngdocs or our custom changes to it.

Gruntfile.js

@@ -446,15 +446,15 @@ module.exports = function(grunt) {
         },
         scripts: [
            // no jquery automatically loaded for tutorial!!!
-          '//ajax.googleapis.com/ajax/libs/angularjs/1.3.6/angular.js',
-          '//ajax.googleapis.com/ajax/libs/angularjs/1.3.6/angular-touch.js',
-          '//ajax.googleapis.com/ajax/libs/angularjs/1.3.6/angular-animate.js',
+          '//ajax.googleapis.com/ajax/libs/angularjs/1.2.26/angular.js',
+          '//ajax.googleapis.com/ajax/libs/angularjs/1.2.26/angular-touch.js',
+          '//ajax.googleapis.com/ajax/libs/angularjs/1.2.26/angular-animate.js',
           'bower_components/csv-js/csv.js',
           'bower_components/pdfmake/build/pdfmake.js',
           'bower_components/pdfmake/build/vfs_fonts.js'
         ],
         hiddenScripts: [
-          '//ajax.googleapis.com/ajax/libs/angularjs/1.3.6/angular-animate.js',
+          '//ajax.googleapis.com/ajax/libs/angularjs/1.2.26/angular-animate.js',
           'bower_components/google-code-prettify/src/prettify.js',
           'node_modules/marked/lib/marked.js'
         ],