Edit armor types

[avandenberghe]

currently we have a hardcoded property array $armor_type in classes.php and this refers to the language files for actual descriptions.

$this->armortypes = array (
                'CLOTH' => $user->lang ['CLOTH'],
                'ROBE' => $user->lang ['ROBE'],
                'LEATHER' => $user->lang ['LEATHER'],
                'AUGMENTED' => $user->lang ['AUGMENTED'],
                'MAIL' => $user->lang ['MAIL'],
                'HEAVY' => $user->lang ['HEAVY'],
                'PLATE' => $user->lang ['PLATE'] );

this would need to be refactored into a class of its own with translation support.