NEW: graphics/dibuja

Hi ports --

Attached is a new port, graphics/dibuja. Dibuja is a simple to use paint
program.

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pkg/DESCR:
Dibuja is a simple to use paint program like Paintbrush for Mac or
classic MS Paint.

It allows you to easily create drawings and edit images, add arrows,
text, and effects to your drawings and pictures, or crop and resize your
images.
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Works well for me on amd64.

OK?

~Brian