PyPI versino 0.7.0 - 0.7.2 migration changes usage pattern

[MatthewRalston]

The NEW (temporary) usage is

python -m kmerdb -h

I am migrating to a more stable build system using PEP606 standard. I'm using pyproject.toml and pip install of a wheel generated from the repository source generates a usable module, but the bin script pip is generating is no longer able to find the entry_point.