ext_logger 0.2.0

Extended Logger class, log output to console in non-production environment.\n Additional instance method ‘record_memory’ to record memory consumption.\n 2018-12-06(0.2.0): The internal structure changes greatly, adding hash parameters: age (shift_age with Logger object), size (shift_size with Logger object), split_format (log file output according to Ruby time format).\n 2018-11-28(0.1.3): Fixed a path problem during log initialization.