Document and fix running the tests with boot2docker

Add option to redirect all http traffic to https

use ngx_mruby to implement custom headers

Verify to_regex in tests.

Don't pass port in redirects

implement testing for the buildpack

network retry incase nginx hasn't bound to the port yet

use nginx 1.9.1 and reuseport to get socket sharding

These numbers arrived at by wildly unscientific methods involving apachebench.