Introduce Continuous Integration

[flowersinthesand]

As far as I know, Testling is for Browsers and Travis is for Node.js. If so, test app including portal server should be re-written in JavaScript for Node.js.

See
http://ci.testling.com/
https://travis-ci.org/
https://saucelabs.com/
https://github.com/shtylman/zuul
http://karma-runner.github.io/