--task-layout and --task-layout-file options.

Also have the slurmstepd set the SLURMD_NODENAME env variable.

something...

Remove debugging message.

requested.  For instance "slaunch -w foo[4,2,2,2,2,4,4] -n3" will only
launch 3 tasks on foo[4,2,2], and only asks the controller for foo[4,2,2].
If it asked for the whole string, scontroller would balk.

there are entries in the nodelist

Now if a line BEGINS with "Include" and is followed by whitespace and then
a filename, the parser will open and parse that file before continuing to
parse the rest of the current file.

Also improved some parser error messages with line numbers and file names.

Now, there may only be ONE key-value pair per line, EXCEPT on lines
that BEGIN with key-value pairs such as NodeName and PartitionName, which
explicitly accept additional values.

This allows us to eliminate redundant listing of ignored keys...

task distribution (but may fail if switch does not support arbitrary).

poe may have problems with the spawn_task changes.

  Add -D, --dependency option
  Man page updates.

removed task dist from srun put into slurmctld.  need to remove the addresses from job allocation since that isn't needed anymore.  need to fix some issues with the way sbcast does things now which should be easy.  The switch plugins can change also since we have the tasks laid out already now before we set up the switch.  Some more clean up also will be nice in srun.