Note: not yet complete!

=condor_event_timer()= in _dagman_main.cpp_ gets called every five (by default) seconds.  In that function, we call =Dag::SubmitReadyJobs()= to submit any jobs that are ready; ready any new node job events (see ???); output the status of the DAG; and check whether the DAG is finished.

*: Submission/event reading loop -- every 5 sec (default) via daemoncore
*: ready queue -- Job objects go into it when ready to submit
*: pre scripts are handled kind of kludgily -- might make more sense for Job objects to go into the ready queue when the PRE script should be submitted
*: document list of parents, not done parents in Job objects
*: Jobs have lists of parents, pending parents, etc.
*: list of all jobs, ready queue