Update USCIS (with mutilple repos)

[ultrasaurus]

USCIS is a good example of a project with multiple repos. This issue is for the content work related to making that data available on the dashboard.

• mockup what we want it to look like
• make it so about.yml and dashboard support that
• make the content changes

[melodykramer]

https://github.com/18F/data-private/blob/about-yml/projects/uscis.yml This is the work that I did in this repo based on talking to the members of the USCIS team. As you will see, it doesn't look radically different than the way it looked before - but is more comprehensive and details more about the project.