Implement fauna configuration

src/main/java/com/dfsek/terra/population/FaunaPopulator.java

@@ -0,0 +1,29 @@
+package com.dfsek.terra.population;
+
+import com.dfsek.terra.biome.TerraBiomeGrid;
+import org.bukkit.Chunk;
+import org.bukkit.World;
+import org.bukkit.block.Block;
+import org.bukkit.generator.BlockPopulator;
+import org.jetbrains.annotations.NotNull;
+import org.polydev.gaea.biome.Biome;
+import org.polydev.gaea.world.Fauna;
+
+import java.util.Random;
+
+public class FaunaPopulator extends BlockPopulator {
+    @Override
+    public void populate(@NotNull World world, @NotNull Random random, @NotNull Chunk chunk) {
+        for(int x = 0; x < 16; x++) {
+            for(int z = 0; z < 16; z++) {
+                Biome biome = TerraBiomeGrid.fromWorld(world).getBiome((chunk.getX() << 4) + x, (chunk.getZ() << 4) + z);
+                if(biome.getDecorator().getFaunaChance() <= 0 || random.nextInt(100) > biome.getDecorator().getFaunaChance())
+                    continue;
+                Block highest = Fauna.getHighestValidSpawnAt(chunk, x, z);
+                try {
+                    if(highest != null) biome.getDecorator().getFauna().get(random).plant(highest.getLocation());
+                } catch(NullPointerException ignored) {}
+            }
+        }
+    }
+}