D4911: add Baloo DBus signals for moved or removed files

[Nathaniel Graham]

ngraham added a reviewer: michaelh.

REPOSITORY
  R293 Baloo

REVISION DETAIL
  https://phabricator.kde.org/D4911

To: mgallien, vhanda, dfaure, michaelh
Cc: ngraham, cullmann, apol, #frameworks, michaelh