Submits job scripts to Sun/Oracle Grid Engine with qsub.

SGE directives can be provided in the flow.cylc file:

        job runner = sge
        platform = sge_platform
        execution time limit = P1D
            -cwd =
            -q = foo
            -l h_data = 1024M
            -l h_rt = 24:00:00

These are written to the top of the job script like this:

#$ -cwd
#$ -q foo
#$ -l h_data=1024M
#$ -l h_rt=24:00:00

If execution time limit is specified, it is used to generate the -l h_rt directive. Do not specify the -l h_rt directive explicitly if execution time limit is specified. Otherwise, the execution time limit known by the workflow may be out of sync with what is submitted to the job runner.