[ticket/11574] Try to load updated service.yml before the default one

PHPBB3-11574
[ticket/11574] Find language files in update/new before throwing an error

PHPBB3-11574
[ticket/11574] Require new files in database_update.php and add a class loader

PHPBB3-11574
[ticket/11574] Require new files in install/index.php and add a class loader

PHPBB3-11574
[ticket/11574] Load new language files whenever possible

PHPBB3-11574
[ticket/11574] Use request object rather then request_var function

PHPBB3-11574
[ticket/11574] Add correct language parameter to return links

PHPBB3-11574
[ticket/11574] Create phpbb_log object before using it.

PHPBB3-11574
[ticket/11574] Include vendor into update packages

PHPBB3-11574
[ticket/11574] Use log object instead of old function

PHPBB3-11574
[ticket/11574] Only fall back to install/update versions, when IN_INSTALL ;)

PHPBB3-11574
[ticket/11574] Include normalizer so it loads form the correct directory

PHPBB3-11574
[ticket/11574] Use alternate DI config file for updater

PHPBB3-11574
[ticket/11574] Make install language filename less crazy

PHPBB3-11574
[ticket/11574] Fix various path issues in the updater

PHPBB3-11574
[ticket/11574] Fix table prefix in database updater

PHPBB3-11574
[ticket/11574] Add trailing slash for consistency

PHPBB3-11574
[ticket/11702] Fix forum_posts left over for link-click counts in viewforum.php

PHPBB3-11702
Merge remote-tracking branch 'nickvergessen/ticket/11702' into develop

* nickvergessen/ticket/11702:
  [ticket/11702] Fix forum_posts left over for link-click counts in viewforum.php
Merge pull request #7 from igorw/ticket/11574

[ticket/11574] Fix various path issues in the updater