Modified `args.py` so that commandline arguments are read.

[kalleknast]

No commandline arguments were be read when using

args = ['--gpu', '0']`
args = parser.parse_args(args)

args = parser.parse_args() allows arguments to be read.

[salesforce-cla[bot]]

Thanks for the contribution! Before we can merge this, we need @kalleknast to sign the Salesforce.com Contributor License Agreement.