Cg Hub

Combine cg hub downloading, query and metadata parsing into one place under gmt cg-hub.
I totally agree. Having the key file be shared and world readable defeats the purpose of the key file. It has been typical practice that we do this. Not passing the buck, but LIMS was tasked with setting this up, and that is why the cg hub commands are also just deployed to /cgquery/bin. We could make a JIRA issue to try and address this problem. What do you think?