D16523: [Extractor] Replace homegrown IO handler with QDataStream, catch HUP

[Stefan Brüns]

bruns added a dependent revision: D16524: [Extractor] Use QDataStream 
serialization in place of cooked one.

REPOSITORY
  R293 Baloo

REVISION DETAIL
  https://phabricator.kde.org/D16523

To: bruns, #baloo, #frameworks, ngraham, poboiko
Cc: kde-frameworks-devel, ashaposhnikov, michaelh, astippich, spoorun, ngraham, 
bruns, abrahams