Travis Kalanick did not leave Uber quietly so there was no doubt he would be back in the field sooner than later. After selling about $1.5 billion of his shares to SoftBank earlier this year, the energetic Kalanick, a longtime startup investor and advisor, said in a short statement on Twitter he would create a fund called “10100” (pronounced ‘ten-one-hundred’) for both for-profit and non-profit...