call `ignoreRoute` with settled response object and finer grain filtering

[hharnisc]

Building ignoreRoute rules around the res.statusCode we're not previously possible.

[hharnisc]

I've also pushed a change here to specify sub-keys in req/res objects.

I wanted to include the remoteAddress from the response object, but req.connection is HUGE.

Now you can whitelist it like this

expressWinston.requestWhitelist.push("connection.remoteAddress");