Add meta attributes
Remove dots at end of meta.description
Add very hacky script to generate Perl packages

Given the name of Perl module, this script will download the package
containing the module from CPAN, determine its dependencies, and print
a Nix expression suitable for inclusion in perl-packages.nix on
stdout.

Example:

$ ./maintainers/scripts/generate-cpan-package DBIx::Class
  DBIxClass = buildPerlPackage {
    name = "DBIx-Class-0.08205";
    src = fetchurl {
      url = mirror://cpan/authors/id/F/FR/FREW/DBIx-Class-0.08205.tar.gz;
      sha256 = "16iyrfvwf4y94wxpwlla131grdf10z4xx9q9s6jsi39ycaxdaj6l";
    };
    buildInputs = [ DBDSQLite PackageStash TestException TestWarn ];
    propagatedBuildInputs = [ ClassAccessorGrouped ClassC3Componentised ClassInspector ConfigAny ContextPreserve DataCompare DataDumperConcise DataPage DBI DevelGlobalDestruction HashMerge ModuleFind Moo MROCompat namespaceclean PathClass ScopeGuard SQLAbstract SubName TryTiny ];
    meta = {
      homepage = http://www.dbix-class.org/;
      description = "Extensible and flexible object <-> relational mapper.";
      license = "perl";
    };
  };