Enhancements:
Adds 'release_status' and 'dist_suffix' properties in preparation
for adding CPAN Meta Spec 2 support. 'dist_suffix' will be set
to 'TRIAL' automatically when necessary. [David Golden]Makes 'license' more liberal. You can now specify either a license
key from the approved list (c.f. Module::Build::API) or just a
Software::License subclass name (e.g. 'Perl_5'). This should
provide better support for custom or proprietary licenses.
[David Golden]