Ported some services to Qt5/KF5
Summary: This patch ports the ampache, magnatune, gpodder and opmldirectory services. I've laid some groundwork for the other services too, but they still have problems. For example: Jamendo has changed its API, which makes the service useless in its current form. Mp3tunes and lastfm don't work either, but I haven't yet investigated why.
Reviewers: Amarok, markey
Reviewed By: Amarok, markey
Subscribers: asturmlechner, Amarok
Differential Revision: https://phabricator.kde.org/D10831