nodewords 6.x-1.6

Changes since DRUPAL-6--1-5:

• #650718 by fenstrat: Auto meta description generation: third-party modules filter regex is broken.
• By kiamlaluno: Updated nodewords.api.php to include the description of hook_nodewords_tags_alter().
• #650790 by kiamlaluno: Prepopulation of nodewords on translated nodes.
• #651208 by kiamlaluno: Error while updating.
• By kiamlaluno: Corrected the examples of the implementations of hook_nodewords_tags_alter(), and hook_nodewords_tags_output_alter().
• #652210 by kiamlaluno: Meta tag SCHEMA.DC is always output.
• #651896 by kiamlaluno: Meta tag ROBOTS for lists is not used.
• By kiamlaluno: Removed the call to array_merge() made in nodewords_form().
• By kiamlaluno: Simplified the code of nodewords_update_6115().
• By kiamlaluno: Corrected the description for the form field to select the meta tags which appears in the meta tags edit form to make it clear that it doesn't apply to the default meta tags values edit form.
• By kiamlaluno: Removed a hidden form field that was not necessary.
• By kiamlaluno: Removed _nodewords_get_unique_values() from nodewords.install.
• #653812 by kiamamluno: Change the way the meta tags content is saved in the database.