Leave comment describing how to re-baseline stats
Move comment to proper place

Re-baselining happens at the very end. Because of that, don't round
projections to integers just yet.
Since this isn't yet the final projection, mutate the projection matrix

Save the 'final_projection' matrix for... the final projection.
Use a variable to stash the PA vector shape
Rename league_total to weighted_league_total

Renamed variable because a league total will need to be calculated.
Check if there's an output file first
Actually rename variables for batter/pitcher split