Support PPD attributes, page size

[jslabovitz]

Your CupsFFI library has been very useful to me. However, I needed a way to fetch PPD attributes, as well as page size. So I added the code. I'd not worked with FFI before, so I may have done some things wrong, but it's working already for me.

I'm trying to send you a patch, but I can't seem to attach one here, or include it without it being marked up. How should I send it to you?

[nehresma]

Glad to hear you find it useful. Probably the easiest way to send the code would be to just fork the project, make the change to your forked copy, then initiate a pull request.

[nehresma]

Merged. Thanks!