Log Message:
Update to 4.80

Upstream changes:
4.80 Nov 1st, 2012

    [NEW FEATURES]
    - New built-in constraint_methods to test the number of values submitted for a
      particular field:

        FV_num_values(1),
        FV_num_values_between(1,2),  # inclusive

      One way that garbage can get through a Data::FormValidator profile is
      when two values are submitted when only one is intended. In this
      case, this application could end up with a values like this:

          ARRAY(0x841214c)

     Using these new constraints, you can precisely control how many values
     are allowed for each field.

    [INTERNAL]
    - Source control hosting has been moved to http://hub.darcs.net
      You can now browse, pull and fork the darcs repo through this website.

4.71 Oct 2nd, 2012

    [BUG FIXES]
    - Custom messages for built-in constraints work again. It appears that this
      was broken in 4.70, which triggered a sleeper bug.

      (Thanks to Lee Carmichael, Mark Stosberg, RT##73235)

4.70 11/11/11

    [NEW FEATURES]
    - Built-in constraints in Constraints.pm can now be renamed:

        constraint_methods => {
            first_names =>  {
                constraint_method => FV_max_length(3),
                name => 'custom_length',
            }
        },

     (Thanks to heinst@arqs.com.br for the suggestion, RT#49477)

    [INTERNALS]
    - modernize Constraints.pm and Results.pm a bit.
    - Module::Build added to configure_requires in Build.PL

4.67 11/11/11

    [INTERNALS]
    - modernize FormValidator.pm internals a bit
    - Update META.yml to exclude an internal package from getting indexed.