[ticket/11914] Use unix line endings in plupload queue css file

PHPBB3-11914
[ticket/11914] Update plupload to 2.0.0

There are no longer seperate javascript files for each type of uploader.
New filenames have been kept as used inside the plupload package.

PHPBB3-11914
[ticket/11525] Only remove group or user prefix from given avatar data

Until now, the user data had both user_id and group_id keys in the avatar
data. As both group_ and user_ prefixes were removed the group_id was
collapsed onto the user_id and therefore all users in the same group had
the same prefix for their uploaded avatars. This patch will make sure
that the correct id is used depending on whether it's a group's or user's
avatar data.

PHPBB3-11525
[ticket/11998] Add symfony/console as dependency.

PHPBB3-11998
[ticket/11998] Basic console application script.

PHPBB3-11998
[ticket/11998] Use container to get all commands using 'console.command' tag.

PHPBB3-11998
[ticket/11998] Also setup extension class loader.

PHPBB3-11998
[ticket/11998] Add console command for recalculating email hash.

PHPBB3-11998
[ticket/11943] Add test for DEFINE $VAR = false

PHPBB3-11943
[ticket/11943] Do not quote the value when it is exactly true, false, or null

Quoting these can change the meaning of the value (e.g. 'false' == true)

PHPBB3-11943
[ticket/11914] Add assets version to included plupload scripts

PHPBB3-11914
[ticket/11998] Move application file to bin/phpbbcli.php

PHPBB3-11998
[ticket/11998] Add phpBB abstraction for application and command.

PHPBB3-11998
[ticket/11998] Turn develop/extensions.php into console commands.

PHPBB3-11998
[ticket/11927] Correctly add new files on update

Currently we ignore language and style files when the directory where they
go to do not exist. However in 3.1 we introduce some new sub directories:
* language/en/email/short/
* styles/prosilver/theme/en/
So we need to change our check to look whether the language or style exist,
rather then the parent directory.

PHPBB3-11927
[ticket/11927] Add doc block to new function

PHPBB3-11927
[ticket/11927] Prefix function with phpbb_

PHPBB3-11927
[ticket/12002] Add link hash to extension manager links

PHPBB3-12002
[ticket/12002] Change functional test to use link hash

PHPBB3-12002
[ticket/12001] Ensure that form data is sent to server in AJAX requests.

PHPBB3-12001