Can I fork it?

Hi there,

I’d been thinking about developing a plugin like this for my blog when I found yours. Whereas it’s similar to what I’m wanting to do, I would like to make some changes. Would you mind if I forked it? Don’t really know the etiquette for this kind of thing, am just getting into building plugins…thought it best to ask 🙂

thnx!
-jennyb

http://ww.wp.xz.cn/plugins/article-difficulty-level/