There are already questions surrounding Facebook’s purchase of Instagram for $1 billion yesterday. Was it a talent purchase (of 13 employees)? Is it the peak of social media purchases before the bubble starts bursting? Is Facebook only interested in companies with zero revenue? Is this a play against Google+? Twitter? There’s one question that was clearly answered: “How do you build a billion dollar company in 17 months?” In this Instagram Infographic, Visual.ly takes us down the path that started in March, 2010, when Kevin Systrom and Mike Krieger raised $500,000 in seed funding for burbn,…