By ServiceObjects: Fixed issue with module calling FastTax even when a state is not selected for taxes. Fixed issue with numerous redundant calls to service per checkout (solution is to add back the caching). Minor wording tweaks. Added a Cache settings tab that clears the cache manually. Also fixed #654664 by ramsey85: Applied patch to fix order preview infinite loop.
-- Fixed incorrect production URL for DOTS Fast Tax Web service
-- Fixed system_schema() errors during installation
-- Fixed tax line being displayed twice
-- Fixed the "get tax by zip code" failover feature
-- Changed module to get tax information by address rather than by city/state alone, then failover to zip if necessary.
-- Changed text in the settings page to more clearly show the section for "Sales" tax settings and "Use" tax settings.
