v0.2.0: Improved API for extracting distorted hits and charges

- Distorted positions of simulated hits can be now extracted without going
through the entire simulation chain. Can help with studies of distortion effects
- In addition to digitized output, added the ability to output zero suppressed
charges per channel
- Reworked test to do numerical comparison to a reference without dumping values
in a text file
- General code clean up and reorganization. Registered DOI with Zenodo. Removed
unused cofiguration structs