- 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.
- General improvements of the docs.
- Move all ItemStack code to the ItemPocketComputer class
- Make PocketAPI execute on the server thread, rather than the computer
thread
