travis.yml :: use build containers & disable email

Author: mimetnet

.travis.yml

@@ -1,5 +1,10 @@
+sudo: false
+
 language: node_js
 
+notifications:
+  email: false
+
 before_install:
   - '[ "${TRAVIS_NODE_VERSION}" != "0.8" ] || npm install -g npm@1.4.28'
   - npm install -g npm@latest