Dynious/BlockExtenders — pull request #5 by squeek502 (2014-02-02 14:54:32+00:00)
Title: Reworked a lot of the GUI system to be way more multiplayer-friendly

* Moved GUI handling server-side using IGuiHandler and Containers
* Any value updates get sent to any client with that tile's GUI open (meaning you can see changes other players make in real-time)
* The correct values are sent from the server to the client whenever a GUI is opened
* Packets sent from a GUI to the server no longer need to send the tile information, as we can now get the player's openContainer