Preserve (allocated) state of nodes when config file is re-read (reconfig API)

Add function framework for job step node selection.
Remove reference to defunct job specification of procs_per_task.
Remove reference to defunct function delete_job_record().

Add function framework for job step node selection.
Remove reference to defunction job specification of procs_per_task.

Add function framework for job step node selection.

to cancel a job, issue the job_step_cancel RPC with a step_id
of NO_VAL.

and RPCs. This will all be managed directly by srun/slurmd.

each job table record.

Added prolog and epilog to job diagrams

Add cpucount by node for resource allocation

 of the required node specifications

changed unpack_strarray to null terminate the array of strings

removed gid from messages this will come from getpwuid call
added a needed include to scancel to compile
removed old test from job_mgr_test that wouldn't compile due to changes in the api

Added some new error codes for scancel API