Update 0.3.53.15

Improvements:

Dinosaurs are once again able to walk backwards, slowly, at a quarter of their speed.
When attacking, the player's dinosaur now attacks the closest dinosaur instead of any dinosaur that was close enough to attack.
When eating, the player's dinosaur now eats the closest piece of food instead of any piece of food that was close enough to eat.

Bug Fixes:

Dinosaur corpses should now turn into a pile of flesh at the correct time, when half of their flesh has been eaten.
Smelling is now showing dinosaur and food outlines correctly.