lib/foursquare2/tips.rb
def mark_tip_todo(tip_id, options={})
      response = connection.post do |req|
        req.url "tips/#{tip_id}/marktodo", options
      end
      return_error_or_body(response, response.body.response)
    end
def mark_tip_todo(tip_id, options={})
      response = connection.post do |req|
        req.url "tips/#{tip_id}/marktodo", options
      end
      return_error_or_body(response, response.body.response)
    end
Mark a tip todo for the authenticated user.

 param [String] tip_id - The id of the tip to mark.