replaced DoI highlighted specimen table cell with biohazard image; extended DoI alert to all worklists (was missing from some); changed C::R::Misc::get_unique_ids to get_unique_request_ids for clarity in caller
added callback to C::WorkList::display() to display requesting username of requested test/panel; removed MooseX::AttributeHelpers from all classes - using Moose::Meta::Attribute::Native syntax
