Add computation of derivatives of r(theta,phi) from spectral expansion...
- Add computation of derivatives of r(theta,phi) from spectral expansion.
- Add support for gauss-legendre collocation points and quadrature.
- Add Ker metric in cartesian coordinates (not tested).
- Add checks on AHF module to work locally without installation.
- Fixes to Kerr-Schild metric and add functionalities (WIP).
Edited by Sebastiano Bernuzzi