Lanczos resizing method

[kiyoon]

I saw that the Bicubic algorithm has been implemented recently. This is very good news for me because now I can use the whole zune-image pipeline to load and have simple manipulations of images, without losing quality (before I had to use bilinear).

I'd like to see Lanczos algorithm as well. It's known to be slow so I hope it does give dramatic performance improvements here over other implementations.

Thank you!

[etemesi254]

Lancazos will also be implemented.

Just needs some time