added specimen type to reports summary display; adjusted layout on reports summary pdf; amended order by requests.created_at to request_draft_report.created_at so now correctly displayed by report date
moved paginator code into own sub; separated model get_report_counts into own sub, using new count() method in Local::DB; new config item paginator.siblings; general code tidy
added authentication function using D2::Plugin::Auth::Extensible; new admin function to register new user; removed GET /login route - using auto_page()
changed user authentication from hilis4.users to hilis4.draft_report_users - automatically creates new entry in draft_report_users table if user exists in hilis.users table
fix for 'mysql gone away' problem in Routes::AJAX - app definition was incorrect, and gave it a 'before' hook to check_db_connection as precaution; removed debugging info in DB::check_db_connection
