add actors to support Sun Grid
Chirs Zhu <email@example.com> and others at Sun have contributed actors that allow Kepler to be used as a client for the Sun Grid. They have requested that these new actors be integrated into the release. To do so, we need to:
1) Test the code, including development of workflow tests and unit tests as needed
2) Check copyright and licensing for the contribution to be sure it can be distributed under the BSD and the authors have rights to distribute
3) Incorporate new actor code into Kepler CVS
See attachments for details.