site_verify 6.x-1.0-beta3

Changes since DRUPAL-6--1-0-BETA2:

• by Dave Reid: Added upgrade/import path from the verifications in xmlsitemap_engines.module.
• by Dave Reid: Added upgrade path from Google Apps Verification module.
• by Dave Reid: Optimized the XML sitemap migration upgrade.
• #467240 by andypost, Dave Reid: Added support for Yandex and updated Google examples.
• #467582 by andypost, Dave Reid: Revised the user interface for better usability.
• by Dave Reid: Cleaned up the multi-step form code and menu load callbacks.
• by Dave Reid: Fixed engine integration with form code.
• by Dave Reid: Removed unnecessary double 'add' link.
• by Dave Reid: Improved the table listing (get rid of the unhelpful 'Verification' column).
• by Dave Reid: Simplified the validation callbacks.