Add response body as last param of callback

[timoxley]

Make the response body available in assertion callback:

request(app)
.get('/')
.expect(200, function(err, res, body) {
   assert.ok(body.something.etc)
})

Just for convenience, it's the most commonly accessed property of the response (at least in my use cases) and it matches up with mikeal's request module. Also thinking this may be handy in superagent (and perhaps should be implemented there first)

[tj]

-1 from me, I dont like how mikeal's thing does it similar to jQuery, IMO res.body looks better than adding another param

[fengmk2]

-1, res.body or res.text work.

[timoxley]

Agreed.