create status for a ref in a repo
create.repository.status(owner, repo, ref, ..., ctx = get.github.context())
the repo owner (user, org, etc)
the name of the repo
Ref to list the statuses from. It can be a SHA, a branch name, or a tag name.
parameters that describe the status. see http://developer.github.com/v3/repos/statuses/#create-a-status for details.
the github context object
the list of statuses