GitHub imposes a limit of 60 unauthenticated requests per hour. This is really easy to hit when using grip, especially if you're doing other things using the API at the same time. Once your reach this limit, grip no longer functions (you see an error message about rate limiting when you try to render a page).

I'd like to add options to grip to specify GitHub username and password so that grip can perform Basic auth in renderer.py. This bumps the limit to 5000 requests/hour which should be enough for anyone :)

Any thoughts on this change?

I guess I see these being new command line options.