Add seleapsec.txt to installed file in RPM .spec
Comment block fixup for GswePlanet

Add Orcus and Asbolus
Reorder comments so it lines up with the actual values
Add GSWE_PLANET_LILITH and offsets to the documentation sections
Add asteroid Hygiea
Add Universal Time calculation functions

This is required for sidereal time calculations later. get/set Julian
day functions have been renamed to have an _et suffix. Meanwhile, the
old gswe_timestamp_get_julian_day() and gswe_timestamp_set_julian_day()
functions have been deprecated.
Remove deprecated function calls from own code
Fix GTK-Doc warnings about deprecated symbols
Add function gswe_timestamp_get_sidereal_time()