[boost] [graph] Documentation error for the adjacency_list_traits<> type.

Hi. The adjacency_list_traits<> documentation (adjacency_list_traits.html) lists its first template argument as EdgeList while it should be OutEdgeList. The way it is written now it causes confusion between the OutEdgeList and the (seemingly still unfinished) EdgeList concept. Hope this helps. Best regards, Jurko Gospodnetić