Foliage variation

In this first devlog I've added the foliage assets, currently there is a pine tree, a birch tree, a birch sapling and a bush

There are

 5 variation of the pine tree

4 variation of the birch tree

4 variation of the birch sapling

4 variation of the bush

Every asset have 16 different variation of the color for every change of light in world as in 

nown, day, sunset and night

And for every time of the day there is a weather change like fine, cloudy, overcast and rain 

In the next update, the foliage will get its own animation and a seasonal coat