Log Message:
Update from version 2.46 to 2.47.

Upstream changes:

Version 2.47:   ( Wed Jan 21 11:32:24 IST 2009 )
------------------------------------------------

* Fixed bug https://rt.cpan.org/Ticket/Display.html?id=34067 :
  - Multiline values returned as array references in tied hash interface
  - This was as opposed to the documentation.
  - added t/21multiline-values-in-tied.t and fixed some older tests.

* Moved the eval'ed debugging code (_assert_invariants) to its own module,
  without the eval so the perl-5.6.2 will be happy. Now explicitly use'ing it
  from t/lib where appropriate. See for example:
  - http://www.nntp.perl.org/group/perl.cpan.testers/2009/01/msg3101788.html