Test with stuff + Forestry potential support

BM_src/forestry/api/arboriculture/IToolGrafter.java

@@ -0,0 +1,19 @@
+package forestry.api.arboriculture;
+
+import net.minecraft.entity.player.EntityPlayer;
+import net.minecraft.item.ItemStack;
+import net.minecraft.world.World;
+
+public interface IToolGrafter {
+	/**
+	 * Called by leaves to determine the increase in sapling droprate.
+	 * 
+	 * @param stack ItemStack containing the grafter.
+	 * @param world Minecraft world the player and the target block inhabit.
+	 * @param x x-Coordinate of the broken leaf block.
+	 * @param y y-Coordinate of the broken leaf block.
+	 * @param z z-Coordinate of the broken leaf block.
+	 * @return Float representing the factor the usual drop chance is to be multiplied by.
+	 */
+	float getSaplingModifier(ItemStack stack, World world, EntityPlayer player, int x, int y, int z);
+}