Gregg Allman’s bandmates and confidantes reflect on his life and music.Jack PearsonYou bonded with Gregg on a songwriting level. What were your collaborations like? Gregg wrote so many great songs, and to get to write with him was amazing. We co-wrote “Come Back and Help Me” with William Howse. It was on Searching for Simplicity. We were on tour and had a day off, and I said, “Hey,…