Loadskernel

- Added comprehensive tutorials as well as coresponding aeroelastic models of the DC3 created by Francisco Carvalho

- Maintenance release maily with bug fixes, perfromance improvements and updated documentation
- Dropped support for Python versions lower than 3.10

- Publish as PyPi package
- Added continuous integration workflows on GitHub.com
- Added coding style analysis (Falke8 and Pylint) and applied formatting suggestions, there should be no functional changes.
- Python 3.10 and 3.11 compatibility
- Added DOI

- Model is stored as HDF5 file, no more .pickle files in most workflows
- Speed up preprocessing for structural models with many degrees of freedom
- Import of system matrices (mass, stiffness) from Nastran via HDF5
- Fixed handling of deformations in local grid point coordinate systems (CP and CD)
- Improved / more robust comparisons with reference data during testing (signs of eigenvalues and vectors may change depending on outside temperature, humidity and the phase of the moon...)
- Minor improvements to SU2 CFD solver interface

- Publication as Open Source under the BSD 3-Clause License
- Update of the documentation to Version 1.04
- Extended interface to the SU2 CFD solver for time domain simulations
- Improved bdf reader

- Administrative changes only (improved the Readme, added issue templates, created this changelog, etc.)