update traceur version

Author: guybedford

Gruntfile.js

@@ -41,7 +41,7 @@ module.exports = function (grunt) {
       },
       traceur: {
           options: {
-            banner: '/*\n  Traceur Compiler 0.0.9 - https://github.com/google/traceur-compiler \n*/\n'
+            banner: '/*\n  Traceur Compiler 0.0.25 - https://github.com/google/traceur-compiler \n*/\n'
           },
           src: 'lib/traceur.js',
           dest: 'dist/traceur.js'