Adds submit_workers common code
condor_submit_workers with common script
sge_submit_workers with common script
torque_submit_workers with common script
slurm_submit_workers with common script
ec2_submit_workers with common script
Merge branch 'scriptkenstein'

Cleaning up *submit_scripts. The user would have to define a function
submit_workers_command, and optionally define show_help, and parse_arguments.
As an example I only changed condor_submit_workers.

minimal skeleton:

. ./submit_workers.common

submit_workers_command()
{
...
}

submit_workers $*