Added creative tabs for blocks and items and associated language entries. Added check for iron nugget, to prevent double registry.

src/main/java/com/sosnitzka/taiga/Blocks.java

@@ -105,6 +105,7 @@ public class Blocks {
                 Class<?> targetType = field.getType();
                 try {
                     Block block = (Block) field.get(targetType); // Gets the field as a BasicBlock which is then casted to an Block
+                    block.setCreativeTab(CreativeTab.tabTaigaBlock);
                     Utils.registerBlockWithItem(block); // Registers block and its item
                     if (block instanceof BasicBlock) { // Checks that the block is a BasicBlock
                         if (((BasicBlock) block).isOreDict()) { // Checks that the block has an oreDict entry