Add -qq parameter to unzip to eradicate the unzip __MACOSX caution.

![screen shot 2013-07-21 19 06 22 0000](https://f.cloud.github.com/assets/1889575/832232/0e8f0396-f23d-11e2-9339-8b5b2cddc0d5.png)

I added the -qq parameter to remove the Caution when unzipping a file due to forks. See [man unzip](http://www.info-zip.org/mans/unzip.html) for more information