BillyJack's simple leather mods.

This patch applies BillyJack's simple leather mods to all tilesets:

    http://dffd.wimbli.com/file.php?id=8107
    http://www.bay12forums.com/smf/index.php?topic=132489.0
Updates to Billy Jack's leather 12 Nov

- Fixed an issue with drake scales being tanned
- Fixed Balrog and Dragon Raptor entries appearing as leather types