Add bookshelf interface to arcane workbench

Implements the main functionality:
- Access bookshelves from within the workbench
- Search by spell name, tier, element and type
- Sort by tier, element or alphabetically, ascending or descending
- Three-way shift-clicking support
- Automatic return of books to bookshelves when wand is removed

src/main/java/electroblob/wizardry/block/BlockBookshelf.java

@@ -50,16 +50,6 @@ public class BlockBookshelf extends BlockHorizontal implements ITileEntityProvid
 		return new BlockStateContainer.Builder(this).add(FACING).add(BOOKS).build();
 	}
 
-	@Override
-	public boolean isOpaqueCube(IBlockState state){
-		return false;
-	}
-
-	@Override
-	public boolean isFullCube(IBlockState state){
-		return false;
-	}
-
 	@Override
 	public BlockFaceShape getBlockFaceShape(IBlockAccess world, IBlockState state, BlockPos pos, EnumFacing face){
 		return state.getValue(FACING).getAxis() == face.getAxis() ? BlockFaceShape.UNDEFINED : BlockFaceShape.SOLID;