D7949: Allow to print pdf doc directly into a QPrinter

[Henrik Fehlauer]

rkflx resigned from this revision.
This revision now requires review to proceed.

REPOSITORY
  R223 Okular

REVISION DETAIL
  https://phabricator.kde.org/D7949

To: sander, #okular
Cc: okular-devel, asturmlechner, cfeck, ltoscano, rkflx, michaelweghorn, 
ngraham, aacid