2.5:
updated to Forge 14.23.1.2555;
added a function which checks whether a player holds a particular item;
added Pipe interface;
renamed method in ControlsContainer;
added ranged synchronization method to SyncableTileEntity;
fixed SelectionButton not highlighting when selected;
added "isEmpty" method to ItemHandler;
ItemHandler now merges same itemstacks first;
insertion method merges same itemstacks first, too;
added access interface;
added a function for checking valid UUID;
fixed a bug when GuiContainer2#onGuiClosed() was called on opening the UI;