Angular

@dgreisen-cfpb, here's a rough pass at stubbing out the repo group management stuff in angular. Check out `repo-groups.json` to see if the way it's structured correctly. From the notes I took it sounds like there are repo group users with roles. Repos inside the group also have users but they can have different roles. For example: himedlooff has read access to the Capital Framework repo group. Inside that group he is also a user of the cf-buttons repo and has admin access to it. Let me know if I got that right.

The other way I can order the JSON file is with just a list of users and for each user list the groups and repos they have access to and what role they have in that repo.