Create a strong relationship between background, race, and the probability of
a skill becoming better from use. This would provide the opportunity for an
uptune of nomads and some of the traditionally crippled tank races. Ideally,
this would over time allow a tank to advance core skills well over skillmax
without being forced to sacrifice levels. I am not sure if the current
skillmax system supports having skills over the maximum do any good, but I
just thought I should toss the idea out here.