Perfomace fix for servers with small TPS.

As we know, minecraft server while loop should do 20 iterations per seconds, but if server is loaded, big or etc, server iterations per seconds will dramatically reduced. To prevent mod from lagging, we change tile update logic from ticks to milliseconds. So even if tick reducted, all should be fine. Same logic has Bukkit Furnace https://github.com/MinecraftPortCentral/MCPC-Plus-Legacy/blob/master/src/minecraft/net/minecraft/tileentity/TileEntityFurnace.java#L278. Let us be awesome <3