Dan Lyons was a magazine writer and the technology editor at Newsweek. But one Friday morning, he found out that he’d lost his job. He was 50 with a wife and two kids. What was he going to do?  And then he had an idea — since he had so much experience reporting on Silicon Valley and the tech explosing, why not join it? So Dan scored a gig with HubSpot, a Boston start-up flush with 100 million dollars in venture capital.  It was an experience, to say the least.