Changed
- Removed all optional GPL licenced routines (GSL, Einspline, Cubature, ALGLIB and PythTB)
- Changed license from GPLv3 to BSD 3-clause
- Smaller changes in the documentation (had to remove references to make it compile with numpydoc)
- Removed functionality to calculate the closed Fermi Dirac integrals and the tests that depended on this