D26202: WIP: Refactor KConfigXT

[David Faure]

dfaure added a reviewer: dfaure.

REPOSITORY
  R237 KConfig

REVISION DETAIL
  https://phabricator.kde.org/D26202

To: tcanabrava, #frameworks, ervin, bport, dfaure
Cc: bport, ngraham, kde-frameworks-devel, LeGast00n, GB_2, michaelh, bruns