Log Message:
Update to 0.22:

 - Replaced the split_like_shell() method on Windows with a
   near-no-op, which is probably more correct and has the benefit of
   not messing up UNC paths. [John R. LoVerso, see
   http://rt.cpan.org/Ticket/Display.html?id=26545]

 - Fixed extra_compiler_flags on Windows, they were being
   ignored. [Robert May]