nodewords 6.x-1.3-alpha2

Changes since DRUPAL-6--1-3-ALPHA1:

• By KiamLaLuno: Corrected the update SQL query to avoid it returns multiple rows.
• By KiamLaLuno: Corrected the form identifier passed to the function handling the meta tags.
• By KiamLaLuno: Changed "meta tag Description" with "meta tag DESCRIPTION".
• By KiamLaLuno: Changed a function name from _nodewords_description_match_callback to _nodewords_teaser_match_callback.
• By KiamLaLuno: Removed the code added as per #601264.
• By KiamLaLuno: Changed the update function to do nothing if the database table doesn't contain rows.
• By KiamLaLuno: Changed nodewords_update_6102() to use update_sql().
• By KiamLaLuno: Changed nodewords_update_6113() to use update_sql().
• By KiamLaLuno: Corrected the insert queries in the update functions, and added two more table indexes.
• By KiamLaLuno: Corrected the SQL query executed in nodewords_update_6106().