upgrade karma, use global gulp on deploy

Author: levithomason

package.json

@@ -58,7 +58,7 @@
     "highlight.js": "^8.9.1",
     "imports-loader": "^0.6.4",
     "json-loader": "^0.5.3",
-    "karma": "^0.13.10",
+    "karma": "^0.13.13",
     "karma-mocha": "^0.2.0",
     "karma-mocha-reporter": "^1.1.1",
     "karma-phantomjs-launcher": "^0.2.1",

wercker.yml

@@ -77,15 +77,15 @@ deploy:
     - script:
         name: install global packages
         code: |
-          npm i -g babel
+          npm i -g babel gulp karma webpack
     - script:
         name: build stardust
         code: |
-          $(npm bin)/gulp build
+          gulp build
     - script:
         name: generate docs
         code: |
-          $(npm bin)/gulp docs
+          gulp docs
     - script:
         name: Deploy to github pages
         code: |