Added first version of primary execution script.
Added first version of primary execution script.

Currently this script can parse command-line arguments for a file containing
the job to execute and options controlling the verbosity of the log
information.

nyee/RMG-Py,comocheng/RMG-Py,pierrelb/RMG-Py,comocheng/RMG-Py,faribas/RMG-Py,nickvandewiele/RMG-Py,nickvandewiele/RMG-Py,KEHANG/RMG-Py,chatelak/RMG-Py,pierrelb/RMG-Py,faribas/RMG-Py,chatelak/RMG-Py,KEHANG/RMG-Py,nyee/RMG-Py,enochd/RMG-Py,enochd/RMG-Py