Bugfix and path cleanup

This version features the following:

• Fixing the addition of new neutral cross-sections.
• Cleaned up a few unit tests.
• Allowing for external input paths
• Set sensible default values

Release 1.3.0: Noise, neutrals and utility

Release with new features:

• Extended unit testing
• Optimization of utility
• Noise modelling
• Atomic physics for neutrals
• Package dependency updates
• getdata_setup.xml updated!

Release 1.2.0: Mass-effects included

Rate scaling for plasma isotopes with different masses included.
Acceptance test comparing to old RENATE cleared up.
Atomic DB read restructured, unit tests created.

Release 1.1.0: Benchmarked version

Code restructured to facilitate integration into CHERAB, several bugs corrected, benchmarked against old RENATE, a regression-like test created.

Release 1.0.0

First release with the capability of calculating beam evolution along a beamlet with plasma parameters given along the beamlet. Handles impurities.