lib/foursquare2/checkins.rb
def add_checkin_comment(checkin_id, options={})
      response = connection.post do |req|
        req.url "checkins/#{checkin_id}/addcomment", options
      end
      return_error_or_body(response, response.body.response)  
    end
def add_checkin_comment(checkin_id, options={})
      response = connection.post do |req|
        req.url "checkins/#{checkin_id}/addcomment", options
      end
      return_error_or_body(response, response.body.response)  
    end
Add a comment to a checkin.

 @param [String] checkin_id the ID of the checkin.
 @param [Hash]  options
 @option options String :text - Text of the comment to add, 200 character max.