add Baloo DBus signals for moved or removed files
Summary:
Add new DBus signals sent by Baloo indexer for removed or moved files.
I still need to extend existing automatic tests with checks that the signals are sent
Reviewers: vhanda, dfaure, michaelh, Baloo
Reviewed By: dfaure
Subscribers: ngraham, cullmann, apol, Frameworks
Tags: Frameworks, Baloo
Maniphest Tasks: T4931
Differential Revision: https://phabricator.kde.org/D4911