Merge pull request #303 from jesseli2002/docs_update

Clarify docs on what traversal category allowed

Author: jeremy-murphy

doc/Graph.html

@@ -87,7 +87,8 @@ <H3>Associated Types</H3>
 graph can be visited. The choices are <TT>incidence_graph_tag</TT>,
 <TT>adjacency_graph_tag</TT>, <TT>bidirectional_graph_tag</TT>,
 <TT>vertex_list_graph_tag</TT>, <TT>edge_list_graph_tag</TT>, and
-<TT>adjacency_matrix_tag</TT>.
+<TT>adjacency_matrix_tag</TT>. You can also create your own
+tag which should inherit from one or more of the above.
 </td>
 </tr>
 

doc/graph_traits.html

@@ -200,9 +200,9 @@ <H2>Members</H2>
 The traversal category tags are:
 <tt>incidence_graph_tag, adjacency_graph_tag,
 bidirectional_graph_tag, vertex_list_graph_tag,
-edge_list_graph_tag, vertex_and_edge_list_graph_tag,
+edge_list_graph_tag,
 adjacency_matrix_tag</tt>. You can also create your own
-tag which should inherit from one of the above.
+tag which should inherit from one or more of the above.
 </td>
 </tr>