Move Creative Tab class to library since it's only used there for the registry.

src/main/java/tconstruct/TConstruct.java

@@ -30,7 +30,7 @@ import tconstruct.armor.TinkerArmor;
 import tconstruct.armor.player.TPlayerHandler;
 import tconstruct.armor.player.TPlayerStats;
 import tconstruct.client.TControls;
-import tconstruct.common.TConstructCreativeTab;
+import tconstruct.library.TConstructCreativeTab;
 import tconstruct.common.TProxyCommon;
 import tconstruct.library.TConstructRegistry;
 import tconstruct.library.crafting.Detailing;

src/main/java/tconstruct/library/TConstructCreativeTab.java

@@ -1,4 +1,4 @@
-package tconstruct.common;
+package tconstruct.library;
 
 import net.minecraft.creativetab.CreativeTabs;
 import net.minecraft.item.Item;

src/main/java/tconstruct/library/TConstructRegistry.java

@@ -13,7 +13,6 @@ import net.minecraft.item.ItemStack;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 
-import tconstruct.common.TConstructCreativeTab;
 import tconstruct.library.crafting.Detailing;
 import tconstruct.library.crafting.LiquidCasting;
 import tconstruct.library.crafting.ToolBuilder;