Shear

[MggMuggins]

Hi, I'm enjoying this library quite a lot. The interface is simple and consistent and it's more than fast enough for my purposes. I am wondering how I would go about doing a shear operation on an image with this library. I'm not seeing anything in the docs with a function that would provide it, could anyone give me any pointers? I'd be willing to write up a function and contribute it if anybody's interested.