Travis setup

[Pavel Filippov]

Hello,

dalekjs is awesome. However, I have a hard time trying to make it work on Travis-CI. 

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. Does anybody may be has a working example of dalekjs running on Travis?