rename fields in the JSON response for more coherence (4029ba9)
ephemerides: compute ephemerides if the position is set only (467c822)
events: add support for opposition events (fa2da9e)
BREAKING CHANGES
the fields “details” and “ephemerides” have been switched.
ephemerides: invoking kosmorro command without --latitude and
--longitude arguments will now only output the Moon phase and,
eventually, the events for the given date (or today if date not given).