ANDOR graph modules

ANDOR: a ros service mdoule for the Task Representation.

The communication msg is included.

There are two branches for AND/OR graph:

master: The standard AND/OR graph, with the option to have several parallel AND/OR graphs (stable version).
hierarchical: The Hierarchical AND/OR graph.

For more Information on the standard AND/OR graph algorithm you can check following paper:

Darvish, Kourosh; Wanderlingh, Francesco; Bruno, Barbara; Simetti, Enrico; Mastrogiovanni, Fulvio; Casalino, Giuseppe "Flexible human–robot cooperation models for assisted shop-floor tasks", Journal of Mechatronics.

If you have any question, or if you find a bug please contact me by: kourosh.darvish@gmail.com