- Added code to check if multilist function already exists
- Added missing field to sitemap_seo_install.php file.
- Changed primary key in links_exchange table to language_id
- Fixed coding mistake in admin/functions/sitemap.php regarding curl
- Fixed problem some have with Array.
- Removed the deprecated call by reference code in both includes/functions/sitemap.php files
- Removed references to TABLE_SITEMAP_SEO_EXCLUDE, which was never used
- Replaced category_tree.php file with one that reads nested directories.

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