Initially:
./tools/setup.sh
. virtualenv/bin/activate
Developing:
vim lib/mosaicify/__init__.py
vim lib/mosaicify/colors.py
vim lib/mosaicify/pixels.py
Running:
mosaicify --help
See also:
https://blog.ryankelly.us/2017/01/02/image-mosaics-with-python.html