empymod/empymod: empymod v1.7.1

New routines in empymod.filters.DigitalFilter: Filters can now be saved to or loaded from pure ascii-files.

Filters and inversion result from empymod.scripts.fdesign are now by default saved in plain text. The filters with their internal routine, the inversion result with np.savetxt. Compressed saving can be achieved by giving a name with a '.gz'-ending.

Change in empymod.utils:

• Renamed _min_param to _min_res.
• Anisotropy aniso is no longer directly checked for its minimum value. Instead, res*aniso**2, hence vertical resistivity, is checked with _min_res, and anisotropy is subsequently re-calculated from it.
• The parameters epermH, epermV, mpermH, and mpermV can now be set to 0 (or any positive value) and do not depend on _min_param.

printinfo: Generally improved; prints now MKL-info (if available) independently of numexpr.

Simplification of kernel.reflections through re-arranging.

Bug fixes

Version of re-submission of the DLF article to geophysics.