Tutorial #08 - Metablocks and -items

* Added MetaBlock.class
* Added ItemBlockMetaBlock.class
* Added MetaItem.class
+ Changed ModBlocks and ModItems in order to call the new blocks and
items
+ Changed the language file
+ Copied the textures from blocks to items (for the metaitem)

Signed-off-by: Bedrockminer <minerbedrock@gmail.com>