[Inkscape-docs] Extensions guide

Hi,

I wrote an extension a few years ago, and just updated it this weekend. When reading through the docuemntation I saw that you're looking for someone to write/flesh out the extension guide. I'd like to give it a try.

I have experience with with inkscape and python both, not so much with ruby and perl. I have not found any docs for simpletransform, simplestyle, and inkex so I read trough them. They are pretty easy to understand, but it would be nice if there were some deatails about them on the wiki, not just articles using them.

matyilona