ubercart 7.x-3.0-beta3

Changes since Ubercart 7.x-3.0-beta2:

• API:
  • Add Ajax-enabled "uc_address" form element for full or partial address entry.
  • Handle temporary cart items with quantity of zero.
  • $item->data is consistently unserialized in hook_uc_cart_item().
  • 'Default quantity to add to cart' is respected when quantity field is hidden.
  • Add hook_uc_payment_gateway_alter().
  • Add hook_uc_checkout_pane_alter().
• Theme:
  • Pass order object to theme_uc_cart_complete_sale().
  • Default product image size increased from 100x100 to 250x250.
• UI:
  • Converted all address forms to Ajax.
  • Date formatting is now handled by Drupal core settings.
• Misc:
  • Purchased files with unlimited downloads cannot be purchased twice.
  • Added some SimpleTests.
  • Removed hard dependency on Rules.
  • Numerous documentation fixes and improvements.
  • A multitude of bug fixes.