New features in June

Features added last month (r404):

• Added is_not_found field to the geocache objects.
• Added some new features to use when submitting a new log entry: on_duplicate to prevent duplicate log entries, recommend allows users to recommend the geocache, needs_maintenance allows them to notify that the cache needs maintenance.
• Added some new statistics fields to user objects: cache_found, caches_notfound, caches_hidden, rcmds_given.
• New interactivity option gives you some more control when authorizing your users.