Merge branch 'develop' into feature/dic

* develop: (441 commits)
  [feature/new-tz-handling] Don't use global user but make it a parameter
  [feature/new-tz-handling] Fix size of suggestion button in chrome
  [feature/new-tz-handling] Fall back to UTC, if the timezone is invalid
  [feature/new-tz-handling] Add previous selected value to validation if valid
  [feature/new-tz-handling] Display suggestion when a different value is selected
  [ticket/10998] Add border-radius to forum rules block - prosilver
  [feature/new-tz-handling] Remove additional marking of selected items
  [feature/new-tz-handling] Move update helper function to new class
  [feature/new-tz-handling] Fix unit test
  [feature/new-tz-handling] Delete old variable which is not used anymore
  [feature/new-tz-handling] Rename $user->tz back to $user->timezone
  [feature/pagination-as-list] New parameter for name of start var
  [feature/pagination-as-list] Updates for nils comments
  [feature/pagination-as-list] Rename and deprecate functions
  [feature/pagination-as-list] Various fixes and improvements
  [ticket/10968] Render pagination within the template
  [feature/new-tz-handling] Remove "timezone might be numeric"
  [feature/new-tz-handling] Add function to update the timezone
  [feature/new-tz-handling] Correctly update user and board timezones on update
  [ticket/10996] Use correct DBMS name in Travis config for PostgreSQL
  ...

Conflicts:
	phpBB/common.php
	phpBB/composer.json
	phpBB/composer.lock
	tests/cron/task_provider_test.php

tests/cron/manager_test.php

@@ -7,7 +7,6 @@
 *
 */
 
-require_once dirname(__FILE__) . '/../mock/extension_manager.php';
 require_once dirname(__FILE__) . '/includes/cron/task/core/dummy_task.php';
 require_once dirname(__FILE__) . '/includes/cron/task/core/second_dummy_task.php';
 require_once dirname(__FILE__) . '/ext/testext/cron/dummy_task.php';