Now it launchs programs in the same way that the rest of the Chapel
launchers, maintaining uniformity with the rest, so from the user POV it
is transparent.

If someone prefers to use the queue system the variable
CHPL_LAUNCHER_USE_SBATCH can be defined and sbatch will be used to
launch a new job, otherwise it is run as usual.

Has been tested to see that stdin works fine in the programs that need
it.


git-svn-id: http://svn.code.sf.net/p/chapel/code/branches/collaborations@21789 3a8e244f-b0f2-452b-bcba-4c88e055c3ca