perl6 port of HTTP::Tinyish

HTTP::Tinyish ( is a perl5 http client wrappers, which is "embeddable" or "fatpackable", written by miyagawa san.

I ported it to perl6 (only curl backend).

It passed a basic test, and I think it may be useful some situation.

But there is a problem! Perl6 @*INC does not allow code refs or objects, so we cannot create App::FatPacker!

Let's make CompUnitRepo more hackable!