Add helpers for setting environment properties from the agent
Add environment resources and regrowth; agent resource consumption
Fast plant agent type
Fix incorrect test
An image layer without a useIf test is always used
Fix test so that the offspring placement doesn't get reflected off the environment boundaries
Because of rounding of child locations to integer coordinates, the distance can actually end up 1.5 outside the min/max
Add crossesBarrier support

Checks to see if a line segment intersects a barrier.
Start of rabbit-controllable interactive
Start of BasicAnimal
Add white rabbits

Add a single white rabbit to the controllable white rabbit environment