“The fact that one parent professes an inability to communicate with the other parent does not, in and of itself, mean that a joint custody order cannot be considered. On the other hand, hoping that communication between the parties will improve once the litigation is over does not provide a sufficient basis for the making of an order of joint custody. There must be some evidence before the court that, despite their differences, the parents are able to communicate effectively with one another. No matter how detailed the custody order that is made, gaps will inevitably occur, unexpected situations arise, and the changing developmental needs of a child must be addressed on an ongoing basis. When, as here, the child is so young that she can hardly communicate her developmental needs, communication is even more important. In this case there was no evidence of effective communication. The evidence was to the contrary.”