Minimizing download for CI.

[ahobeost]

As a User and developer, I often need to redo certain things on my own computer that run on CI.
Getting the most up to date version of the pytrnsys.bat file requires having all the other files as well.
Unpacking this from the zip file is slow and I do not always need the newest version of the GUI at the same time.|
Especially when this hasn't changed from the version I currently have.

I would like separate downloadable zip archives focused on specific needs.

1. The current full set
2. Pytrnsys and its requirements only.
3. Pytrnsys with the ddck library.
4. TBD

New users will need the full set, whereas simulations on CI only need pytrnsys to work.
The one caveat is the reusable ddcks in the pytrnsys library, which may be part of such simulations.