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What's new:
* support for L2,3 (2p) XAS, L2,3-M4,5 (2p3d) and L2,3-N4,5 (2p4d) RIXS calculations for 4f elements
* support for L2,3 (2p) XAS calculations for 4d and 5d elements
* support for K (1s) XAS calculations for C3v and Td symmetries including 3d-4p hybridization for 3d elements
* interactive Gaussian broadening for 1D and 2D spectra using FFT
* automatic determination of the number of initial Hamiltonian states
Changes:
* refactoring of the Quanty module by separating a class dealing with the calculation details from the widget class