added logic to spread the work around rather than putting
 it all onto core 0 of each node.

task affinity plugin will always limit the job step to the
allocated CPUs. Improve some related documentation.

unless the --exclusive option is used

Created a very brief overview of job priority that references the more detailed Multi-factor job priority plugin page.

Created a new job_priority.shtml page to provide a brief introduction to the job_priority_plugins.shtml page.

configuration. Prevents memory corruption and infinite loop bugs

    binding information to be logged.

reservations such that nodes currently in use by running jobs
are available by the start of reservations