wpsbuild.pl is enhanced to produce fallback themes that were previously
hardcoded in buildzip.pl. It also recognizes resolution strings as
regular expressions now so you can specify resolution dependant settings
as <setting>.<regex>: <value> (needed to support single themes on multiple
resolutions). The WPSBUILD syntax completely changed as
well and it includes the fallback themes as well. Ultimately wpsbuild is
also able to install .fms files.