fix #626, add AMD module format and make it default

karma.conf.js

 // Karma configuration
 // Generated on Mon Apr 20 2015 06:33:20 GMT-0700 (PDT)
 
 module.exports = function(config) {
   var configuration = {
 
     // base path that will be used to resolve all patterns (eg. files, exclude)
     basePath: '',
 
     // frameworks to use
     // available frameworks: https://npmjs.org/browse/keyword/karma-adapter
     frameworks: ['mocha', 'requirejs', 'chai'],
 
     // list of files / patterns to load in the browser
     files: [
-      'lib/runtime/dart_*.js',
-      // {pattern: 'test/browser/*.js', included: false}
-      'gen/codegen_output/pkg/*.js',
-      'gen/codegen_output/language/**.js',
-      'gen/codegen_output/language/**.err',
-      'gen/codegen_output/corelib/**.js',
-      'gen/codegen_output/corelib/**.err',
-      'gen/codegen_output/lib/convert/**.js',
-      'gen/codegen_output/lib/html/**.js',
-      'gen/codegen_output/lib/math/**.js',
-      'gen/codegen_output/lib/mirrors/**.js',
-      'gen/codegen_output/lib/typed_data/**.js',
-      'gen/codegen_output/lib/*/**.err',
-      'test/browser/*.js',
+      {pattern: 'lib/js/amd/dart_sdk.js', included: false},
+      {pattern: 'gen/codegen_output/pkg/*.js', included: false},
+      {pattern: 'gen/codegen_output/language/**/*.js', included: false},
+      {pattern: 'gen/codegen_output/corelib/**/*.js', included: false},
+      {pattern: 'gen/codegen_output/lib/**/*.js', included: false},
+      {pattern: 'test/browser/*.js', included: false},
       'test-main.js',
     ],
 
     // list of files to exclude
-    exclude: [
-    ],
+    exclude: [],
 
     // preprocess matching files before serving them to the browser
     // available preprocessors: https://npmjs.org/browse/keyword/karma-preprocessor
     preprocessors: {
     },
 
     client: {
       captureConsole: false,
       mocha: {
         ui: 'tdd',
@@ skipping 47 matching lines @@
     configuration.browsers = ['chrome_canary_travis'];
     configuration.autoWatch = false;
     // Enable this for more logging on Travis.  It is too much for Travis to
     // automatically display, but still results in a downloadable raw log.
     // configuration.logLevel = config.LOG_DEBUG;
     configuration.client.captureConsole = true;
   }
 
   config.set(configuration);
 };