use numpy for pimage

[jf___]

hi,

pyprocessing looks sweet!
have you thought of implementing pimage.py with numpy arrays?
this would be orders of magnitude faster.
should be easy to keep the current class if numpy isn't found and use
it if you can import it.
most python image processing libs work with numpy so it also makes
sense from that perspective.

thanks,

-jf

[Pedro]

Thanks for the suggestion, jf___.
Numpy has been implemented and the improvement is very noticeable -
we've decided to make it a requirement for the image filters, since
the older implementation was way too slow.

If you have any other suggestions in the future, feel free to post
them.