Adding XPlanet Viewer
Summary:
Merge remote-tracking branch 'refs/remotes/origin/master'
Merge branch 'master' of https://github.com/KDE/kstars
Merge branch 'master' of https://github.com/KDE/kstars
Merge branch 'master' of https://github.com/KDE/kstars
Adding XPlanet Viewer
Merge branch 'master' of https://github.com/KDE/kstars
Reviewers: mutlaqja, pino
Subscribers: pino, mutlaqja, kde-edu
Tags: KDE Edu
Differential Revision: https://phabricator.kde.org/D14813