• Fixed not to set an error message when extracted nicely
  (spotted by Martin Becker++)
  
• Fixed to restore mtime of MANIFEST.SKIP if it is modified by
  #include_default
  
• Improved primary module detection
  
• Fixed to catch CPAN::Meta::YAML's warnings (of duplicate keys)
  
• Improved test_prereqs_match to handle t::lib::Util, and ignore
  files that contain but don't end with .t
  
• Fixed to store multiple licenses in META files