module to build Parse::Yapp parsers from source

 Module::Build::Parse::Yapp is a subclass of Module::Build made to build
 Parse::Yapp parsers from the source. Thus, prebuilt parsers do not have to be
 included in the source distribution.
 .
 Module::Build::Parse::Yapp looks for *.yp files under 'lib' and produces Perl
 modules in place of them under 'blib/lib'. Therefore, a grammar file
 'lib/A/B/C.yp' will be converted to 'blib/lib/A/B/C.pm' with a package name
 of 'A::B::C'.