Mandatory Image Credit: Rob Schumacher-USA TODAY Sports Jordan Spieth was leading on the 4th day, right on track to win his second straight Masters. As we all know, things started unraveling in the back nine and he finally ended up helping Danny Willett into the green jacket that evening. Some life lessons from that Sunday: 1. It is not "over" till it is really over - At the end of 9 holes, Spieth had a 5 shot lead and was 9 holes away from back to back Masters but it was no