Update Travis to only build and deploy on success

.travis.yml

@@ -1,13 +1,13 @@
 language: node_js
+notifications:
+  email: false
 before_install:
   - rvm install 2.4.0
 install:
   - gem install awesome_bot
 script:
   - awesome_bot README.md --allow-ssl --allow 403
-after_script:
+after_success:
   - cd build
   - sh build.sh
   - sh deploy.sh
-notifications:
-  email: false