Phono3py

- `phono3py` command didn't work. This was fixed.
- Fix behaviour when specifying `--thm` and `--sigma` simultaneously.

- Maintenance release to follow phonopy v2.9.0.

- Maintenance release to follow the change of phonopy at v2.8.1
- Improvements of phono3py loader (`phono3py.load`), `phono3py-load` command,
API, and `phono3py_disp.yaml`.
- Harmonic phonon calculation on mesh was multithreaded. This is effective when
using very dense mesh with non-analytical term correction (probably rare
case).
- Real and imaginary parts of self energy and spectral function of bubble
diagram at API level

- `phono3py_disp.yaml` is made when creating displacements in addition to
`disp_fc3.yaml` and `disp_fc2.yaml`. `phono3py_disp.yaml` will be used instead
of `disp_fc3.yaml` and `disp_fc2.yaml` in the future major release (v2.0).

- Release for pypi and conda (atztogo channel) packagings

- Improvements of phono3py loader and API.
- Improvement of interfaces to calculators. Now it is expected to be much easier
to implement calculator interface if it exists in phonopy.
- Fixed dependency to phonopy v2.6.0.