- Update to 0.5.10:
* Added methods ``moon_librations()`` and ``moon_position_angle_axis()``.
* Added method ``moon_maximum_declination()``.
* Fixed several bugs in ``Epoch`` class, and added method ``doy()``.
* Added method ``moon_passage_nodes()``.
* Added method ``moon_perigee_apogee()``.
* Added method ``moon_phase()``.
* Added methods ``illuminated_fraction_disk()`` and ``position_bright_limb()`` to ``Moon`` class.
* Fixed error in the return type of method `Sun.equation_of_time()`.
* Added methods to compute the Moon's longitude of ascending node and perigee.
* Added `Moon` class and `position()` methods.
* Added method `ring_parameters()` to Saturn class.
* Added method `__hash__()` to Epoch. Now Epoch objects can be used as keys in a dictionary.
* Added funtionality to compute the positions of Jupiter's Galilean moons.
* Added methods to compute Saturn's ring inclination and longitude of ascending node.
* Additional encoding changes.
* Deleted `encoding` keyword from setup.py, which was giving problems.
* Added encoding specification to setup.py.
* Fixed characters with the wrong encoding.
* Fixed undefined variable in `Epoch.tt2ut`.