(This is another in a series of 30 guest columns that will run in October, when optimism reigns supreme across the NBA. The theme will be “Five Reasons to Feel Positive About … ” We encourage you to follow the authors on Twitter and visit their sites. – CS) The early portion of the free agency period gave off the appearance that the sky was literally falling on the Dallas Mavericks. The chase to try to land Deron Williams fell short as