Feature and bugfixes [SEE DESC]

Added TNT and Hopper minecarts
Fixed piston code failing without an extension set
Repeaters are now broken
Fixed not being able to place a minecart on an activator rail
Added much needed comments on piston code
Fixed minor formatting issue

Tools/ProtoProxy/Connection.cpp

@@ -212,6 +212,8 @@ enum
 	OBJECT_MINECART         = 10,
 	OBJECT_MINECART_STORAGE = 11,
 	OBJECT_MINECART_POWERED = 12,
+	OBJECT_MINECART_TNT     = 13,
+	OBJECT_MINECART_HOPPER  = 14,
 	OBJECT_TNT              = 50,
 	OBJECT_ENDERCRYSTAL     = 51,
 	OBJECT_ARROW            = 60,