use gh token set in travis-ci repo settings

Author: justincy

.travis.yml

@@ -7,9 +7,6 @@ node_js:
 matrix:
   allow_failures:
   - node_js: '4.0'
-env:
-  global:
-    secure: gwZrOCs5mOukCgPdj1nIqcIAUkw1X7Cy5aa7q1Ofl3mOYLVML7SFKOC8UpfqSDWd+9mLfClYOcy0brgYcco4D16ETWXCtm67WAH8YyOsr/IVKPVCKkwbG5dK0q/9ecjUa+im0/mBw+gprQUObYKADZI8EG6tPYjTTznqDU+ZXvU=
 cache:
   directories:
   - node_modules

Gruntfile.js

@@ -133,6 +133,7 @@ module.exports = function(grunt) {
   ]);
 
   grunt.registerTask('travis', [
+    'clean',
     'build',
     'run:coveralls',
     'gh-pages-clean',