select_region.ipynb
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purpose: make test data sets
how: matplotlib event handling, opens an image, user draws a region (rectangle or ellipse) around skin pixels by clicking and keyboard input
input: rgb image or list of rgb images
returns: rgb image with region (skin) pixels set to zero and rgb image with non-region (non-skin) pixels set to zero. So two rgb images per input image.

Done
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1. event handling
2. return if rectangular regions, NOT working for irregular (elliptical) regions yet

Not Done
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1. return edited rgb images with/without irregular regions
2. comments as raw text, headings, etc.
2. draw more than one region
3. list of images
4. script version