The main aim of this is to allow for greater extensibility for other
mods. For instance, you can now prevent turtles placing dirt blocks, or
turning when on gravel.
- Make InventoryUtil deal with item handlers instead. This
significantly simplifies the implementation, the interface now
does most of the hard work.
- Add InvWrapper item handlers to printers, disk drives and turtles
- Add IItemHandlerModifiable accessor to ITurtleAccess
- Migrate all other inventory code (mostly turtle commands) to use
item handlers instead.
