Create example configuration files

For different studies/analyses, we may want to run our simulator with different input datasets, and using different parameters, and so on...

So it makes sense that we track a few "example" configurations in the repository, at least those that we think are somehow more "representative". The benefits are two:

1. When talking to each other (between programmer and researcher, or with supervisor/colleagues), you can just tell them: "Look at file X in my repository", and all the needed parameters are clearly there, without the need to write long emails or have long meetings ;)

2. Any interested person that reads a publication from you and wants to check out HOW the conclusions were taken, can just clone the repo, and he will find for that paper a file inside the folder "03-configuration-examples", that is exactly what was used in the paper.

We can start by making configuration examples for each of the datasets that we have (LPG, Stedin), or with different numbers of households/EVs that represent "common real-world situations". Of course, published paper parameters can also be written already.