add setting to config-> disable butterflies spawn

+ default disable is false

src/main/java/forestry/core/config/Config.java

@@ -31,7 +31,7 @@ import forestry.mail.gui.GuiMailboxInfo;
 
 public class Config {
 
-    public static boolean disableButterfly;
+    public static Boolean DISABLE_BUTTERFLY;
     public static final String CATEGORY_COMMON = "common";
     public static final String CATEGORY_FLUIDS = "fluids";
 
@@ -147,7 +147,7 @@ public class Config {
 
         configCommon = new LocalizedConfiguration(configFileCommon, "1.2.0");
 
-        disableButterfly = configCommon.getBooleanLocalized("mobs", "disable.butterfly", false);
+        DISABLE_BUTTERFLY = configCommon.getBooleanLocalized("mobs", "disable.butterfly", false);
 
         gameMode = configCommon
                 .getStringLocalized("difficulty", "game.mode", "EASY", new String[] { "OP, EASY, NORMAL, HARD" });

src/main/java/forestry/lepidopterology/ButterflySpawner.java

@@ -23,7 +23,7 @@ public class ButterflySpawner implements ILeafTickHandler {
 
     @Override
     public boolean onRandomLeafTick(ITree tree, World world, int x, int y, int z, boolean isDestroyed) {
-        if (Config.disableButterfly) {
+        if (Config.DISABLE_BUTTERFLY) {
             return false;
         }
 

src/main/java/forestry/lepidopterology/entities/EntityButterfly.java

@@ -370,7 +370,7 @@ public class EntityButterfly extends EntityCreature implements IEntityButterfly
 
     @Override
     protected boolean canDespawn() {
-        if (Config.disableButterfly) {
+        if (Config.DISABLE_BUTTERFLY) {
             this.setDead();
         }
         return ticksExisted > MAX_LIFESPAN;

src/main/java/forestry/lepidopterology/items/ItemButterflyGE.java

@@ -92,7 +92,7 @@ public class ItemButterflyGE extends ItemGE {
     @Override
     public void addInformation(ItemStack itemstack, EntityPlayer player, List list, boolean flag) {
         super.addInformation(itemstack, player, list, flag);
-        if (Config.disableButterfly && type == EnumFlutterType.BUTTERFLY) list.add(ChatFormatting.RED + "Disabled");
+        if (Config.DISABLE_BUTTERFLY && type == EnumFlutterType.BUTTERFLY) list.add(ChatFormatting.RED + "Disabled");
     }
 
     @SuppressWarnings({ "rawtypes", "unchecked" })
@@ -115,7 +115,7 @@ public class ItemButterflyGE extends ItemGE {
 
     @Override
     public boolean onEntityItemUpdate(EntityItem entityItem) {
-        if (type != EnumFlutterType.BUTTERFLY || Config.disableButterfly) {
+        if (type != EnumFlutterType.BUTTERFLY || Config.DISABLE_BUTTERFLY) {
             return false;
         }
         if (entityItem.worldObj.isRemote || entityItem.ticksExisted < 80) {