Log Message:
Update from version 0.63 to version 0.64.

Pkgsrc changes:
- Adjust dependency on devel/p5-Class-MOP

Upstream changes:
0.64 Wed, December 31, 2008
    * Moose::Meta::Method::Accessor
      - Always inline predicate and clearer methods (Sartak)
    * Moose::Meta::Attribute
      - Support for parameterized traits (Sartak)
      - verify_against_type_constraint method to avoid duplication
        and enhance extensibility (Sartak)
    * Moose::Meta::Class
      - Tests (but no support yet) for parameterized traits (Sartak)
    * Moose
      - Require Class::MOP 0.75+, which has the side effect of making
        sure we work on Win32. (Dave Rolsky)