Merge remote-tracking branch 'owncloud/master' into db-convert-tool

* owncloud/master: (61 commits)
  [tx-robot] updated from transifex
  Make email display name change translatable again
  Ignore jquery.multiselect.js - it's 3rdparty
  javascript code cleanup + fixing syntax errors
  Revert "close-button for share_dropdown"
  close-button for share_dropdown
  [tx-robot] updated from transifex
  The latest developer manual link
  The latest developer manual link
  p() and print_unescaped() also take arrays as parameter
  Check whether the user has permissions to add personal storage backends
  [tx-robot] updated from transifex
  Fix a wrong WebDAV Warning with self-signed-certs
  fix translation link
  upda mailinglist address
  fix contribute link
  default to GET request when no method is set to fix unittests, also set parsed json parameters on the post attribute
  Correctly process request parameters other than GET or POST, dont use globals in the class but inject it
  [tx-robot] updated from transifex
  use references for middleware to fix problems on 5.3
  ...