Life is painful for those of us who try to manage our daily workload in Gmail. The stars, the labels and filters, Google's inaccurate "Priority Inbox" ranking system, the extensions... well, they all sort of help out. But my inbox is still a mess and yours probably is, too. Until someone comes up with a vastly superior communication protocol (one of those frighteningly ambitious problems), a new startup called Streak is trying to create order from the inside. Part of last year’s summer Y Combinator class, the company is bringing customer relationship management (CRM) functionality directly into Gmail.