Amset

New features:

- Added tool to plot transport properties (`amset plot transport`).
- Added tool to plot mobility in more detail (`amset plot mobility`).
- Added tool to plot convergence (`amset plot convergence`).
- Added option to highlight scattering rates by the derivative of the Fermi–Dirac
thought `amset plot rates <filename> --dfde`.

Enhancements:

- Reduce memory requirements when `cache_wavefunction = False`.
- Don't write output files if `file_format = None`.

Bug fixes:

- Re-enabled CRTA and MFP scattering.
- Don't use multiprocessing with basic scatterers.
- Fix direction dependent effective masses.

Enhancements:

- Faster wave function overlap calculation using numba jit.
- Better management of memory and error reporting in subprocesses
- Automatically handle memory errors when caching wave function coefficients.

New features:

- Multiprocessing now used in the calculation of scattering rates. Number of processes
controlled using the `nworkers` option.

Bug fixes:

- More robust extraction of deformation potentials.
- Only use ascii characters in output log files.

New features:

- Enable amset to handle systems containing a single k-point in a certain direction
(useful for 2D materials).

Bug fixes:

- Fixed a bug in extracting deformation potentials introduced in version 0.3.1.

New features:

- `free_carrier_screening` option to allow free carriers to screen polar optical and
piezoelectric scattering rates (see docs for me details).

Bug fixes:

- Fixed a bug in extracting deformation potentials introduced in version 0.3.0.