1.0-rc2

[attipaci]

• Go back to split date for cirs_to_itrs() / itrs_to_cirs() and tod_to_itrs() / itrs_to_tod() for high-accuracy support.
• Rename make_ephem_body() to make_ephem_object() to consistency with enum NOVAS_EPHEM_OBJECT.
• Switch body name and ID order in novas_ephem_provider() to match make_ephem_object()
• rename enum novas_dynamical_class to enum novas_equatorial_class, and values to NOVAS_REFERENCE_CLASS and NOVAS_DYNAMICAL_CLASS.
• Change SIZE_OF_OBJ_NAME back to 50 and SIZE_OF_CAT_NAME to 6 to keep footprint the same so it is binary interchangeable with NOVAS C 3.1.
• Add ecl2equ() to complement existing equ2ecl().
• Return NaN values in more cases with errors to reduce silent failures. (Nonetheless, you should always check the returned status / value for errors rather than assuming that the calls worked as you expected.)
• Various fixes and tweaks here and there
• README fixes
• More complete test coverage.
• Upload coverage to Coveralls.io also, and use badge from there.