6.0 Experimental Changes

- Cleaned up commenting and code. Trying to move repetitive code chunks
into separate methods to clean up and shrink code.
- Readiness and Multistrike should now be completely implemented,
instead of just mostly.
- is_day setting added for racial purposes (also uses adv_params
default to night).
- All relevant racials should be fully implemented with placeholder
values where applicable, except Expansive Mind (Gnome).
- 1.5x (instead of 2x) crit modifier for pvp implemented.

- Tweaked combat phases to experiment with results. Forces combat to
use just AR and no SB.

NOTE: Preliminary evidence suggests my hunch about readiness having
increasing returns is true. Not sure if that will be
good/bad/irrelevant right now.