2015 Changes to True Formula and Projected Averages

The plan initially was to let you know what has changed with True and the Plus Power Rankings projected averages at the same time I introduced the new Timeslot Stats table for the Vault, which has more advanced details on these things. But it's become clear that just the "what has changed" portion of that undertaking makes for a really long post in its own right. So here are some of the gory details about the actual metric changes. The intro to the Timeslot Stats overhaul will come when that is ready, which I hope will be pretty soon!