quadtree files #60
Description
it looks like there is some additional stuff that's not integrated according to the rest of the repo structure.
There's unique/distinct data in libpysal/cg/tests/data and some images in libpysal/cg/tests/img. The data should live in examples, and we shouldn't ship the images at all. Also, those are used in an ipynb file inside of the test directory which should also not be shipped in libpysal.