detro/ghostdriver — pull request #393 by NielsZeilemaker (2014-10-01 08:19:53+00:00)
Title: Allow a user to set the zoomFactor using the desiredCapabilities

I havn't been able to test this, but I think it should work.
This will allow me/us to set the zoomFactor of the page using the desiredCapabilities dict.

Usage:
```
phantomjs.page.zoomFactor = 5
```