A week after TV writer Liz Feldman lost a family member unexpectedly and found out her fertility treatment had failed again, she took a meeting with some producers, having been told she didn’t need to come with ideas. So she was immersed in loss and blindsided when she was asked for ideas after all. A seasoned improvisor, Feldman delivered. That quick pitch turned into the Netflix series ‘Dead to Me,’ a funny show about grief.