No of open/closed issues

[mariuscoto]

Need

Keep track of open and closed issues per repository.

Deliverables

Have open_issues and closed_issues attributes for the repo object.

[maria]

Why? :) It will be part of Score?

[mariuscoto]

It may be and is surely is a metric that's worth mentioning.

[maria]

You have for now the open_issues key, getting the closed issues count is a bit harder. WIP