Log Message:
Update from version 0.21nb1 to 0.23.

Pkgsrc changes:
 o Add p5-Class-C3, p5-Class-C3-XS, and p5-MRO-Compat as dependencies

Upstream changes:

0.23  Sun Mar  8 20:30:02 GMT 2009
        - Kill a couple of warnings (one due to MRO::Compat)

0.22  Tue Mar  3 15:54:19 UTC 2009
        - Fix oddly formatted error message.
        - Doc patch to clarify generated classes
        - Switch to use_namespaces and InflateColumn::DateTime for create=static
          by default, with backcompat
        - Switch to MRO::Compat from NEXT
        - Add support for extra Schema::Loader options such as db_schema and
          components