Log Message:
Update to 1.03, provided by Hiramatsu Yoshifumi in PR 28463.

Changes since 1.00:
  - Added 'get_my_factory()' and 'get_my_factory_type()'
  - Ensure that new() returns undef if get_factory_class() doesn't
  work properly and factory_error() is overridden (and the
  overridden method doesn't die)
  - Added a few more tests to ensure factory_log() and
  factory_error() working properly
  - add_factory_type() checks %INC to see if a class is already
  loaded.
  - All log/error messages now have variables in apostrophes
  rather than brackes.