Update ApplicationInstance#visit to use followRedirects()

[davidtaylorhq]

The current implementation of Transition#followRedirects() is identical to the logic here: it catches rejections, and then checks for any other activeTransition. Therefore, this commit introduces no change in behavior.

But, if/when https://github.com/tildeio/router.js/pull/335 lands, it will means we can take advantage of that fix for ApplicationInstance#visit.

[wagenet]

The router.js fix has finally landed. I've pushed the version update to this branch as well.

[wycats]

Is anything blocking this?

[kategengler]

Tests were failing and it has not been updated since