Log Message:
Update from version 0.70 to version 0.71.

Pkgsrc changes:
- add new dependency on devel/p5-Task-Weaken

Upstream changes:
0.71 Wed November 26, 2008
    * Class::MOP::Class
    * Class::MOP::Module
      - Actual package creation has moved upward from
        Class to Module so that Moose roles can share
        the code (Sartak)

0.70_01 Mon, November 19, 2008
    * Class::MOP
      - Fixes for failures with blead (Florian Ragwitz)
      - Silenced compiler warnings (Florian Ragwitz)