Typhoeus adapter, tests fixes

Hi John!

Attached you'll find minor test fixes and a Typhoeus (cURL-based) adapter for Rufus-Jig. The main advantage of Typhoeus is speed, as it uses `libcurl`, and its automagic handling of persistent HTTP connection, like `net-http-persistent` but less hacky :-).

If you want me to produce proper topic branches, I'll do.

Thanks!

~Marcello