Add group system

Initial commit, not tested in multiplayer yet. Some revisions still left
to do.

SQF/dayz_code/Configs/CfgWeapons/CfgWeapons.hpp

@@ -259,6 +259,7 @@ class CfgWeapons
 	#include "Tools\Flashlight.hpp"
 	#include "Tools\FlashlightRed.hpp"
 	
+	#include "Tools\Radio.hpp"
 	#include "Item\ItemKeyKit.hpp"
 	#include "Item\ItemKeys.hpp"
 	

SQF/dayz_code/Configs/CfgWeapons/Tools/Radio.hpp

@@ -0,0 +1,11 @@
+class ItemRadio : ItemCore
+{
+	class ItemActions
+	{
+		class Groups
+		{
+			text = $STR_EPOCH_GROUPS_KEY;
+			script = "spawn dayz_openGroupDialog;";
+		};
+	};
+};