ubercart 6.x-2.0-rc3

Changes since Ubercart 6.x-2.0-rc2:

• 448236 by jhenjuto: Only call uc_cart_get_contents() once on checkout.
• 448254 by Island Usurper: Fix uc_order_update_6008(). Batch was always running on the same set of orders.
• Move order update 6008 to 6010 so it will be reapplied to sites that missed it during rc2.
• 449470 by Norbert Poellmann: Include attribute label in GROUP BY columns as needed.
• 449122 by Island Usurper: Correctly state the cart block visibility settings in the cart overview.
• 5218 by RoloDMonkey: Remove IIS SSL errors from watchdog based on the correct column.
• 449688 by Island Usurper: Separate the price handler subject from the extra data that might be useful to handlers.
• 10745 by Lyle: Format the option costs and prices on the admin list of options.
• 434852 by cha0s: Keep the stock tab only on product nodes (and not product kits).
• 450508 by cha0s: Send role expiration notices and reminder to the user with the role, not to the current user.
• 452652 by Island Usurper: Remove global cache variable as it caused conflicts.
• 452546 by TR: Rename 'uc_notify_store_help_page' to 'uc_store_help_page'.
• 452544 by TR: Remove module_exists('uc_notify') in uc_store.
• 452518 by TR: Variable 'uc_store_url' is never set, so just use the default value.
• 456668 by neochief: Send file download renewal message to watchdog() instead of drupal_set_message().
• 10808 by Lyle: Use divs for addtocart and buyitnow views fields.
• 351189 by Island Usurper: Revert menu paths to not include 'uc-'.