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**2020-07-02**
- Fix example ``tem_walktem``, related to changes in ``scipy.quadrature``:
Replace not-existing private name
``scipy.integrate.quadrature._cached_roots_legendre`` with the public name
``scipy.special.roots_legendre``.
- As a consequence of the above, changed in ``empymod`` the used, old name
``scipy.special.p_roots`` by new, more descriptive name
``scipy.special.roots_legendre``.
- Improve *publications*-section in the example gallery.
- Change error reporting to native (instead of ``print(bla)`` and ``raise
Error`` do ``raise Error(bla)``); improve corresponding error testing by
checking the error message too.