Revision history for Failable

v0.0.1:
    - Initial version

v0.0.2:
    - Nothing changed, I just screwed up v0.0.1's CPAN upload

v0.0.3:
    - Assignments of Failable to Failure or its refinee's type no longer
      throws.
    - Failable now uses v6, not v6.d.
