* ticket/9549:
[ticket/9549] Display users in their primary group instead of their first group
[ticket/9549] Change default value of "sort legend by group name" to false.
[ticket/9549] Fix displaying empty groups
[ticket/9549] Fix language strings.
[ticket/9549] Only add group to legend/teampage when the checkbox is checked.
[ticket/9549] New method move() to move a group more than 1 up/down.
[ticket/9549] Fix some minor issues with descriptions and coding-guidelines.
[ticket/9549] Throw an error when the given field-name is invalid.
[ticket/9549] Make the class non static and extend delete_group function.
[ticket/9549] Add template changes for subsilver2.
[ticket/9549] Enhance teampage and legend functionality
[ticket/9549] Add the module and files for the ACP.
[ticket/9549] Update database with the new config values and columns
[ticket/9549] Enhance teampage functionality with a new class, group_positions.
Conflicts:
phpBB/install/database_update.php