Make OutputTask::num-dims accessible
Propagate property changes to all node copies
Remove some debug output messages

gobject-list is a better tool to analyse the references of GObject's.
Test nodes also with autotools
Move finding longest path to UfoGraph base class
Pass user_data to get_paths and find_longest_path
Add scheduler base class
Add shallow graph copies
Add shallow subgraphs
Improve longest path search

However, this requires also changes in the task graph expansion.
Add UfoGroupScheduler with a different policy
Add shared task mode