Add Plasma Calendar plugin Astronomical Events
Summary:
For now adds the option to show
- lunar phase events (full moon, new moon, quartermoon)
- astronomical season (solstices, equinoxes)
Future plan: also show sunset & sunrise for given location
Reviewers: Plasma, mart
Reviewed By: Plasma, mart
Subscribers: plasma-devel
Tags: Plasma
Differential Revision: https://phabricator.kde.org/D12433