Inspect tweaks.
Default the request url to /
Allow specifying HTTP version for requests.
Fixed inspection of request and response bodies.
When the request body is given as a stream, gather it up in httpRequest.body.
Include a dump of the request in the error message.
Fixed upgrading of the response body for display when it doesn't have a diff.
Fixed display of headers that should be absent.
Reversed expected/actual in diffs so they match mocha's output.
Inspect response bodies without diffs as code instead of text.
Fixed inspection of buffer and parsed JSON bodies.