Investigate getting license info from sources besides about.yml

[mtorres253]

Investigate what we can get from the README.md or other sources, so that people are not having to enter information in more than one place

Investigate whether we can reliably derive the categories suggested above. If we can reliably derive these categories. If we can derive it in all cases then we should remove it from about.yml schema.

Acceptance Criteria:
Idea is we standardize the categories to those mentioned above, and we get the badge infromation from README.md. If there are other services listed in about.yml, we just add them.

[mbland]

Implementation side of 18F/about_yml#82.