Fixed s3-deploy.sh script

There were two problems with `s3-deploy.sh` script:
1. Config file was not loaded so properties from config were always empty.
2. Script was forced to use with `--dry-run` or `-n` arguments. So I was unable to deploy anything :-)

@beryllium as you are creator of this script, can you check my changes as well? Maybe I have misunderstood something.