def add_label(name, color = "fef2c0")
      puts "color: #{color}"
      github.api.add_label(repo, name, color)
    end
def add_label(name, color = "fef2c0")
      puts "color: #{color}"
      github.api.add_label(repo, name, color)
    end
Add new label to repo. Use octolit api.
 http://octokit.github.io/octokit.rb/Octokit/Client/Labels.html#add_label-instance_method