empymod/empymod: empymod v1.4.3

Add TE/TM split to diffusive ee-halfspace solution.

Improve kernel.wavenumber for fullspaces.

Extended fQWE and fftlog to be able to use the cosine-transform. Now the cosine-transform with the real-part frequency response is used internally if a switch-off response (signal=-1) is required, rather than calculating the switch-on response (with sine-transform and imaginary-part frequency response) and subtracting it from the DC value.

Bug fixes

Version of CSEM book.