def stream(path, feed='', params={})
      query = {:query => params.merge!(:T => @auth_token, :output => 'json')}
      feed_name = feed.empty? ? '' : ('/' + feed)
      Helper.request "#{path}#{feed_name}", query
    end
def stream(path, feed='', params={})
      query = {:query => params.merge!(:T => @auth_token, :output => 'json')}
      feed_name = feed.empty? ? '' : ('/' + feed)
      Helper.request "#{path}#{feed_name}", query
    end
stream
  output format : json only
 @param [String] path request path
 @param [String] feed id of subscription
 @param [Hash] params request Parameters
 @option params [Number] :n Number of items. (default 20, max 1000)
 @option params [String] :r Order. (default is newest first. 'o' is oldest first)
 @option params [String] :ot Start time (unix timestamp. ex.1389756192)
 @option params [String] :xt Exclude Target. (ex. 'user/-/state/com.google/read')
 @option params [String] :it Include Target. ('user/-/state/com.google/read(,starred,like)')
 @option params [String] :c Continuation.