Run DalekJs tests on Travis

[emdin]

I cannot make my DalekJs tests work on Travis-CI using headless Chrome.

Here is my set-up:

• Web server is running on localhost:3000
• Dalek tests suppose to use headless Chrome (configured via xvfb)
• Chrome driver use port 6000 (via Dalekfile.json)
• Actual test starts from test.open('http://0.0.0.0:3000')

Here is what I got in Travis:

/home/travis/build/.../node_modules/dalekjs/lib/dalek.js:346
    this.driverEmitter.emit('killAll');
                      ^
TypeError: Cannot read property 'emit' of undefined
  at Object.Dalek._shutdown (/home/travis/build/.../node_modules/dalekjs/lib/dalek.js:346:23)
  at process.emit (events.js:107:17)
  at process._fatalException (node.js:236:26)
The command "dalek test/test.js -l 5" exited with 7.

Please advise.