Test a site using multple browsers at once!

[soulgalore]

It would be really cool if you could choose multiple browsers to use when you test (today you can use only one).

I think the best way is something like this:
Change the -c parameter so that you pass the browsers you want to use: -c chrome,firefox

Then run browsertime for each browser, change the directory structure of the metrics, add browsername folder at the top level. Then make sure multiple summaries are created, one overall and one for each browser (of more than one browser is used). On the summary page, show each and everyone and for the individual page show metrics per browser.

[soulgalore]

wow, this is fixed and merge into master.