capitalises group_concat; combined group & order for formatting rule

new DB::count() sub; Paginator takes siblings arg; QueryLogger formats LIMIT & OFFSET in sql

added dispatcher for test environment

replaced Log::Dispatch::File::Rolling with Log::Dispatch::File for deployment since LDF::Rolling creates redundant file and doesn't handle file permissions properly, and file rotation handled by cron anyway; added today() to Local::Utils

moves all query logging functions to QueryLogger

branched for query-log testing

added method to Local::DB to auto-inflate date(time)s, can be suppressed using var NO_AUTO_DATE_INFLATION set in calling class