D26167: Update holidays and add flagdays and namedays for Sweden

[Nicolas Fella]

nicolasfella added reviewers: KDE PIM, winterz.

REPOSITORY
  R175 KHolidays

REVISION DETAIL
  https://phabricator.kde.org/D26167

To: riiga, #kde_pim, winterz
Cc: ltoscano, kde-frameworks-devel, LeGast00n, GB_2, michaelh, ngraham, bruns