Gzip responses

[caiogandra]

I tried using Servirtium on a Gzip response and it wasn't handled well (the response appeared as if it was broken or in binary). To fix this, I removed the “Accept-Encoding: gzip” from request.

Ideally, Servirtium should be able to un-gzip and re-gzip as necessary and show the un-gzipped version in the markdown.