Add more metadata (license, screenshots)
Changes done:
- Add missing license headers in contactimporter.cpp
- Set project license to
LicenseRef-KDE-Accepted-GPL
- Add LICENSES/LicenseRef-KDE-Accepted-GPL which is required according to the KDE licensing policy https://community.kde.org/index.php?title=Policies/Licensing_Policy
- Add COPYING file with GPLv2 because we are requiring v2 or KDE e.V. later.
Edited by Jonah Brüchert