Releases for e-Commerce Sale

Changes since DRUPAL-5--1-0:

• Corrected grammar to comply with Drupal coding standards.
• Changed settings update message.
• Only respond to nodeapi invocation if node is a product.
• Made code simpler and more consistent.
• Renamed sale_products table to sale_items.
• Changed permission from administer store to administer products.
• Prevented cart link from being modified when item is in cart.

Be sure to run update.php after installing this upgrade.