Saddled with the prospect of producing an unaffordable multi-Lightning-device docking station or offering a DIY alternative, Griffin chose the latter for PowerDock 5 ($100) -- the latest generation of the company's space-saving charging solutions. Made entirely from plastic that ranges from clear to black or white, PowerDock 5 places five USB ports on its right side, a hole for an included wall adapter cable on its back, and a transparent Griffin…