Adds an option to not recoursivly resolve DNS names that are not defi…

[gebl]

Adds an option to not recursively resolve DNS names that are not defined as part of those that are being cooked.

Adds an option to specify a python module that can implement an init and handle function that will be called at start up and when handling requests respectively. The result of the handle method is what is sent as the response to the query allowing for programmatic modification of the response.