Merge branch 'master' into authpdo

* master: (152 commits)
  updated jquery to 2.2.4
  fixed interwiki test
  simplified amazon interwiki links. closes #1588
  minor optimization how cell counts are fixed in tables
  Beautify code
  Keep query params during redirect to headpage
  Add sleep(1) to remoteapicore to ensure new other timestap(=rev nr)
  take care of file size change of zero
  refactor duplicate sizechange code into its own function
  always separate a number and a unit by a non-breaking space
  fix an unfortunate line break in one of the tabs of the mediamanager when using Arabic
  added doku_hasTextBeenModified, rename doku_checkSummary
  shortening dokucookie option names for extension manager
  Fix xmlrpc constructor for php7
  translation update
  translation update
  translation update
  add phpdocs
  remote api ackcheck: if user given, but no groups, retrieve groups
  use variable in remoteapicore_test
  ...