Added a "-auto" option to "rappture -tester" so you can run all tests
without the GUI in the background. This is needed as we try to run
regressions automatically during the contribtool process. In order to
do this, I had to split the Tool object into a "Task" that can run
without the GUI, and the "Tool" that acts as a ControlOwner?. I also
had to support for resource file processing into the generic Rappture
package. As a result, "rappture -tester -auto" can run without an
X window connection.
Added support for "job_protocol mx" in the resources file. If you
specify this, then Rappture will execute "mx cmd arg arg..." to run
each job.
