Feature IC: create toy dataset for single-class image classification

[PatrickBue]

E.g. using cans, bottles, and milk boxes.

• Single-label image classification: single object per image. Maybe also some "negative" images without a single object-of-interest in them.
• Multi-label image classification: 0 or more objects in image.

Maybe 50 images for each of the two datasets?

[jiata]

initial version hosted here

i did not do the following in this initial dataset, so i will have to update:

• negative images for single-label
• 0 objects in image. There is always at least one in the current dataset