Distraction-free writing gadget BYOK is adding custom extensions

BYOK is a no-frills, single-purpose gadget that 90 percent of people will find absolutely frivolous. But for those who spend a significant chunk of their lives putting words to virtual paper, there is an obvious allure. Personally, I think it's at its best when you just stick to the bare minimum, focusing on pure text drafting. Certain users, though, need more. They want BYOK to take notes, they want to use it for writing screenplays, or maybe they want to organize a sprawling novel. Balancing…