New label code - fixes #783, #784, #797, #799

[hallvors]

r?@miketaylr

[miketaylr]

https://github.com/webcompat/webcompat.com/blob/master/tests/test_api_urls.py#L67 needs to be updated.

[miketaylr]

Looks good to me, just a few things to fix:

• move label model to own file
• update failing test
• teach @api.route('/issues/labels') how to do a proxy request for non-auth users

[hallvors]

(On the /api/labels requests, we're probably moving towards having a set of labels "hard-coded" in config, if we can land that soon we won't be using GitHub API here at all I think. But I'll figure out how to make it a "proxy call" meanwhile.)

[miketaylr]

Take a look at the /rate_limit endpoint, that's a pretty simple example of how to do it.

[hallvors]

Ready to merge!

[hallvors]

I'm waiting to see if GitHub is smart enough to auto-close all four issues mentioned in summary when @miketaylr merges this :)

[miketaylr]

Awesome, thanks @hallvors.