Multivariate Testing (MVT)

[rviscomi]

I'm working on a GitHub fork of the webpagetest repository to do multivariate testing. I've written up a thorough blog post about my progress so far and a demo of it in action: http://jrvis.com/blog/wpt-mvt/

The TODOs mentioned in that post are:
- exposing configuration of basic test parameters like number of runs, first/repeat views, private/public, etc
- scripting and custom connection speeds
- a better UI to indicate that browsers are location-dependent
- integrating entire MVT UI into the home page (possibly replacing multi-location and bulk testing)
- ability to limit or disable MVT entirely (settings.ini)
- expansion of templating syntax, with user-defined template variables
Example script: setDns example.com {dns} with the dns variable defined as a querystring parameter, like dns[]=1.0.0.1&dns[]=1.0.0.2. This would also make {dns} available as a variable in the label template.

Any other feedback/suggestions/ideas?