Add dynamic credits scene

[saricden]

Need to create a dynamic credits screen that (ideally) can use APIs to pull both the list of contributors (and maybe collaborators too), along with patrons from Patreon.

Relevant APIs:
https://developer.github.com/v3/
https://docs.patreon.com/#introduction

[saricden]

If it's not possible to draw from APIs for the relevant lists, we can resort to just keeping big JSON files for each. I don't see them growing to a size where this would cause issues. Possibly look at automating a scrape process if that's the path we take.

[saricden]

GitHub:
Collaborators require authentication.
Contributors is public tho: https://api.github.com/repos/saricden/no-place-like/contributors