Sends the contents of an inventory slot to the client-side Container. This doesn't have to match the actual
contents of that slot. Args: Container, slot number, slot contents
void sendProgressBarUpdate(Container containerIn,
Sends two ints to the client-side Container. Used for furnace burning time, smelting progress, brewing progress,
and enchanting level. Normally the first int identifies which variable to update, and the second contains the new
value. Both are truncated to shorts in non-local SMP.