[Test branch] Optimization and BUG fixing

Optimization: There is a small probability that "cat people", "werewolves", "elves", "lizard people" and "goat people" will appear among passengers
Optimization: Prisoners will be automatically released from their cells after being directly ennobled.
New feature: Demographic pyramid can be viewed by race in Statistics
Optimization: Races that do not need to study and are not prompted to become uneducated handymen
BUG: Pigs, as farmers, sometimes do not live in earth houses.
BUG: The problem of cat people not getting married and having children
BUG: The problem with non-dwarf race babies appearing as adults
Optimization: The mini-game for recruiting tourists can bargain for three times.