chore(build): upgrade to Karma 0.12

Upgrade configuration file. However, still use an old version of karma-jasmine
because upgrading to Jasmine 2.x requires a number of test code changes.

Note that firefox-launcher is used for travis CI builds.

Author: chrisirhc

karma.conf.js

@@ -16,9 +16,8 @@ module.exports = function(config) {
     // list of files / patterns to load in the browser
     files: [
       'misc/test-lib/jquery-1.8.2.min.js',
-      'node_modules/angular/angular.js',
-      'node_modules/angular-mocks/angular-mocks.js',
-      'node_modules/angular-sanitize/angular-sanitize.js',
+      'misc/test-lib/angular.js',
+      'misc/test-lib/angular-mocks.js',
       'misc/test-lib/helpers.js',
       'src/**/*.js',
       'template/**/*.js'