Loading a series of pages

[peterstory]

I think it would be useful to be able to load a series of pages with a persistent instance of PhatomJS.

This would facilitate measuring the affect of resource caching. For example, I'd like to load a series of pages on my site, and see how much total time was spent loading CSS and how much CSS was transferred over the network. Then, I will make a change to the way I serve CSS files, load the series of pages again, and see how those CSS-statistics changed.