module Github::Repos::Collaborators

@repos.add_collaborator('user', 'repo', 'collaborator')
@repos = Github::Repos.new

@github.collaborators.add_collaborator('user', 'repo', 'collaborator')
@github = Github.new
Examples:

Add collaborator

def add_collaborator(user, repo, collaborator)
  put("/repos/#{user}/#{repo}/collaborators/#{collaborator}")
end