build: use Travis CI container infrastructure

Author: dougwilson

.travis.yml

@@ -7,5 +7,6 @@ matrix:
   allow_failures:
     - node_js: "0.11"
   fast_finish: true
+sudo: false
 script: "npm run-script test-ci"
 after_script: "npm install [email protected] && cat ./coverage/lcov.info | coveralls"