By investing in hundreds of startups at the earliest stages and targeting overlooked markets, Magnus Grimeland and Antler are putting their own twist on the entrepreneurial dream. After finishing a two-year stint in Norway’s naval special forces, Magnus Grimeland arrived at Harvard as a 23-year-old freshman in 2003. He promptly caught the tech bug, which put him in an opportune place at an opportune time. Grimeland befriended a classmate named Eduardo Saverin. He rowed on the crew team, where he met Cameron and Tyler Winklevoss. He might have even worked for Mark Zuckerberg at TheFacebook, as it was then known, if he weren’t also juggling classes and athletics and caring…