• Interface to alternate ABIs / calling conventions
  
• Added abi method
  
• Added abis class method
  
• Simplify Win32 probe
  
• Added FFI::Platypus::Lang::Win32 which provides data types used by
  the Windows API. Takes care of subtle differences between
  Win32 and Win64.
  
• Fixed bugs specific to 5.8.x
  
• Language plugins can now specify an ABI with abi class method
  
• Default ABI for FFI::Platypus::Lang::Win32 is stdcall on 32bit windows