First update pass (1/3) - ~1400 -> 82 errors

This is first update pass, which is mainly import reorganization, name
fixes, etc... Although some parts of second were done where changes
aren't important.
Errors: ~1400 -> 82.

src/main/java/appeng/container/slot/SlotRestrictedInput.java

@@ -258,7 +258,7 @@ public class SlotRestrictedInput extends AppEngSlot
 
 	public static boolean isMetalIngot( final ItemStack i )
 	{
-		if( Platform.isSameItemPrecise( i, new ItemStack( Items.iron_ingot ) ) )
+		if( Platform.isSameItemPrecise( i, new ItemStack( Items.IRON_INGOT ) ) )
 		{
 			return true;
 		}