WIP: add phantomjs Fixes #1144

[graingert]

[ljharb]

Does this run the tests in phantom, or does it just enable them to be run in phantom?

Also it'd be ideal to run each browser as its own travis-ci build.

[graingert]

@ljharb I'm not sure how to configure it exactly (I can't see anywhere where Chrome is selected as the only browser)

Marking as WIP.

Also it'd be ideal to run each browser as its own travis-ci build.

yup and Browserstack.

[graingert]

@ljharb can you jump through all the hoops for getting Browserstack for OSS?

[graingert]

@ljharb ah looks like karma tests are currently broken anyway. Will try again when they're working on master.

And yes currently the tests try to run Firefox, Chrome and Phantom.