[FIX] Use individual relative stat percentage for stat color

[MiquelRForgeFlow]

Don't use absolute value 255. That value is in fact a false absolute. Only one pokemon reach 255 in a stat (blissey for HP), but maybe someday a new pokemon gets a higher value in another stat.

As it is now, non-evolved pokemons always have red stats, and some yellow. And legendaries will always have green stats. Thus the stat color doesn't say anything new and didn't help much. But my proposal is to change the color of the stat based in a relative way: the bigger stats of a pokemon will be green, the lower red, and around the arithmetic mean yellow. This way, without checking the numerical quantities, we can see a priori which stats are better than others in a specific pokemon.