Ensure we can make a source distro so we can install via PyPi

[raacampbell]

python setup.py sdist then pip install dist/Lasagna-0.1.tar.gz leads to:

Traceback (most recent call last):
  File "/home/rob/miniconda3/envs/lasagna/bin/lasagna", line 5, in <module>
    from lasagna.main import run
  File "/home/rob/miniconda3/envs/lasagna/lib/python3.10/site-packages/lasagna/main.py", line 28, in <module>
    from lasagna.lasagna_object import Lasagna
  File "/home/rob/miniconda3/envs/lasagna/lib/python3.10/site-packages/lasagna/lasagna_object.py", line 16, in <module>
    from lasagna import lasagna_mainWindow, lasagna_axis, ingredients
  File "/home/rob/miniconda3/envs/lasagna/lib/python3.10/site-packages/lasagna/lasagna_mainWindow.py", line 590, in <module>
    import mainWindow_rc
ModuleNotFoundError: No module named 'mainWindow_rc'

But pip install -e . works. Do not know why.