- Debug dfnk bug (only affect ibte not SERTA).
- Take eig wrt to Fermi level
- Missing spin factors
- Update mobility benchmark (values almost the same but population much closer to 0 as it should be).
1) Complete re-writing of the IBTE (at least an order of magnitude faster).
2) Supporting both k-point symmetry and no-symmetry
3) Creating of a few new modules
4) Addition of a epw_mob_ibte_sym for testing the IBTE using k-point symmetry.
Both epw_mob_ibte_sym and epw_mob_ibte should give the same result but
epw_mob_ibte_sym is much faster.