D18079: Use (and suggest using) the nicer K_PLUGIN_CLASS_WITH_JSON

[Albert Astals Cid]

aacid closed this revision.

REPOSITORY
  R241 KIO

REVISION DETAIL
  https://phabricator.kde.org/D18079

To: aacid, apol
Cc: kde-frameworks-devel, michaelh, ngraham, bruns