Added some options for how the model is fit

The model has flags for normalizing and including squared projections.
Also fixed a bug about the year labels.
Changed table structure to single "Player" table
Added code to load the Chadwick register
Removed name matching and auto insertion

Added code to print when a player was not being found
Changed chadwick insertion code to 'merge' from 'add'
Changed commits to occur only every 1k adds

Also added a counter to print progress
Reverted steamer, zips, and pecota id structures

steamer and pecota are know 'as downloaded'. zips 2011-13 must still be
manually matched.
Added zips helper to remove "N/A" ids