Adding usasearch_index module.
Updating documentation for usasearch_index.
Adding max limit to pagesize for index resource.
Issue #2374375 by bonus: Fixed USASearch API implements hook_cron incorrectly.
Adding 2 second timeout to all search requests.
Adding caching logic for USASearch timeouts.
Fixing USASearch index to show only published nodes, and format dates in ISO Standard.
Making usasearch_field work with usasearch_hosted.