Updated the main README file and CHANGES under 1.411 below.
Added support for multiplication and division as well as
case insentivity to the private _parse_max_workers method.max_workers => 'auto', ## = MCE::Util::get_ncpu()
max_workers => 'Auto-1', ## = MCE::Util::get_ncpu() - 1
max_workers => 'AUTO + 3', ## = MCE::Util::get_ncpu() + 3
max_workers => 'AUTO * 1.5',
max_workers => 'auto / 1.333',