This adds job preemption support to select/linear for preempt/qos and 
  optimizes job placement on nodes considering workload from other partitions.

svn merge https://eris.llnl.gov/svn/slurm/trunk https://eris.llnl.gov/svn/slurm/branches/slurm-1.4.srun.hang

I merged changes from the trunk onto slurm-1.4.srun.hang branch as I worked,
so the branch was up to date with ongoing trunk development.  The merge
command above finds the diffs between the trunk and branch--just the development
for the branch--and applies the changes to the trunk.

Validity check values PreemptionType and PreemptMode for compatability
Update documentation on PreemptionType and PreemptMode

  reflects its use

scheduling module when job preemption is configured OFF. Fix in the
future.

Not currently used

Note that config.h.in is rebuilt by autogen.sh, so we can't put it there

  after restart of slurmctld (failed to initialize list of job_ids)

 so we can better log the event

    suspended job is cancelled.

    Accounts/Users with no associations, Accounts with no users or subaccounts
    attached in a cluster, and Users with No UID on the system.
 -- Added new option for sacctmgr list assoc and list cluster WOLimits.  This 
    gives a smaller default format without the limit information.  This may 
    be the new default for list assocations and list clusters.
 -- Users are now required to have an association with there default account.
    Sacctmgr will now complain when you try to modify a users default account
    which they are not associated anywhere.

  a parameter that can't be modified