My code is BSD licensed, so nltk can take and adapt it in any way they choose. However, I won't do any of the work to integrate it into their class hierarchies,

My code is BSD licensed, so nltk can take and adapt it in any way they choose. However, I won't do any of the work to integrate it into their class hierarchies, or to write the tests and documentation in the way that they require. I expect a successful patch request would take a lot of work. That's not a criticism; it's just how it is, given the aims, history and status of their project.