Evolution visibility

[louis030195]

Currently the user have no visibility at all on the evolution of the species even though lot of characteristics are mutated.

Easy way to bring visibility:

• Size: need to influence for example energy consumption otherwise herbivorous would only converge towards bigness
• Color: only animals from a close color can reproduce (it will create species) ? (need to be optional imho)

Can also put some panels with some numbers but that's less fun.