Splits plant and pod people

Plant people can be chosen at roundstart and have no benefits.

Pod people must be grown from pods in hydroponics, and gain health in
the light.

Male plant people have a leaf in the middle of their forehead that
points down, while male pod people do not. Female plant people have two
flowers, female pod people have only one. This serves as a mean of
distinguishing the two. Pod people are supposed to be "growing", while
plant people are adults.