* gtk/gtkctree.[ch] (gtk_ctree_scroll_to): New function (just like gtk_clist_moveto).
* gtkctree.[ch]: removed unneeded GtkCTree::draw_lines (gtk_ctree_get_node_info): New funtion to get data of ctree row. (draw_row): changed drawing order of tree lines, draw triangles in case of GTK_CTREE_LINES_NONE.