Migrate to IItemHandler when MinecraftForge/MinecraftForge#5033 is merged. Should fix mod interaction with mods that fully implemented it (see #1190).

Cj recently refactored inventories again. as i see, now adaptors favor handlers over vanilla interfaces. good.

Well, we will just accept item handler capabilities before the vanilla interfaces. This should be easy enough (the capabilities can be added to our base classes and is easy to implement: just use forge's sidedwrapper)

camo, I think we can bump forge now.

Patched the root classes.

That isn't a full migration, especially for the manipulators. I'm assigning @CovertJaguar to handle them, as he already partially started on it.

manipulators are already covered in item tiles.

Now our invs appear as item handlers to other mods, but we yet need use item handlers.

We exposed our invs as handlers but do not yet use others' handlers.