Separate Out stats.js - Too Much In There

[handstandsam]

As more Stats are collected, the payload for stats.js can start getting pretty large. We can split each stat into their own .js file and then just pull them in as needed.

Along with this we'll need to compute some totals and keep that (like we did with the stat_totals.js).

This will make the page "snappier" and more responsive.