Support nginx

[jzaefferer]

The only real dependency on Apache is the .htaccess file, which we should be able to recreate with nginx rewrites.

Affects https://github.com/jquery/testswarm/blob/master/config/.htaccess-sample

[levidehaan]

I just sent in a pull request with the nginx config and a readme :) let me know how it works for you.

[Krinkle]

@levidehaan Thanks!

[levidehaan]

Arrr no problem :)