Some major changes to the Warband Sim

I am in the process of converting from d10 (ten-sided dice) to d100 (percentile dice).  It turns out that d10 are just too limiting in terms of range and variability.

The other big change is going to variables (e.g., self.ranged) to indicate that a character has a ranged attack rather than having to check class (this is RPG class, not OOP class, e.g., hunter).

Now I need to write a bunch of test code to verify that the changes do what I think they do.