Forget searches of employee workspaces and monitoring Internet activity; employee privacy just got a whole lot more personal. Three Square Market, a Wisconsin-based employer that makes vending machine software, has become the first in the United States to offer to implant employees with microchips to allow them to unlock doors, access office equipment (including computers and printers), and pay for snacks from the on-premises vending machine. For an individual willing to accept an implantation,…