4.5.1

• add table of Compton-scattered energies: mean (90 deg scattering) X-ray energies and mean energy of the scattered electron, integrated over angle dependence (Klein-Nishina disrribution)
• use these tabulated mean energies of the Compton-scattered electron in the calculation of ion chamber fluxes.
• add elements up to Z=118 in element table, and add element name (English). No current X-ray data goes that high....
• many small improvements in doc and use of pyproject/setup.cfg
• replace support for Python 3.7 with support for Python 3.11