Updated application_profiler to log the page cache library that was used. Removed
the extra constant needed for logging database queries, just made it so that if the
profiler is enabled, db queries are logged. Updated view output (the elements file),
and refactored site.php a bit. Also, updated site_post_autoload so that it tests for
the ConcreteRedis class being defined, before trying to do anything with the DNS stuff
or caching library