2004-08-01  Richard Hult  <richard@imendio.com>

	* libplanner/mrp-task-manager.c:
	(task_manager_clean_graph_func),
	(task_manager_build_dependency_graph),
	(add_predecessor_to_dependency_graph),
	(remove_predecessor_from_dependency_graph_recursive),
	(remove_predecessor_from_dependency_graph),
	(remove_parent_from_dependency_graph),
	(add_parent_to_dependency_graph),
	(remove_task_from_dependency_graph),
	(add_task_to_dependency_graph): Build dependency graph in one go,
	and add functions to add/remove a single task.

	(task_manager_traverse_dependency_graph),
	(task_manager_calc_relation),
	(task_manager_do_forward_pass_helper),
	(task_manager_do_forward_pass), (task_manager_do_backward_pass),
	(mrp_task_manager_rebuild), (mrp_task_manager_recalc): Use the new
	dependency graph when doing the CPM forward/backward passes.

	(check_predecessor_traverse),
	(mrp_task_manager_check_predecessor),
	(mrp_task_manager_check_move): Check for loops in the graph when
	adding a predecessor or moving a subtree.

	* libplanner/mrp-private.h:
	* libplanner/mrp-task.c: (task_init), (task_finalize),
	(task_remove_subtree_cb), (imrp_task_insert_child),
	(imrp_task_get_graph_node): Replace the dependency tree + links
	with a graph.

	* tests/files/test-2.planner:
	* tests/scheduler-test.c: (main): Make it simple to add more test
	files, and add one.