Log Message:
Update from version 0.27 to 0.29.

Upstream changes:

version: 0.29
date:    Tue Nov 11 22:57:07 PST 2008
changes:
- Check SvNIOK when dumping and format if quotes when it's a string that looks
  like a number
- Parse plain scalars as numbers when they look like numbers
- Load nulls as newSV(0) instead of &PL_sv_undef to avoid "Modification of
  non-creatable hash value attempted" errors

version: 0.28
date:    Mon Jun 23 15:23:24 PDT 2008
changes:
- Apply UTF8 patch supplied by KLEINJ in rt.cpan#36734