Allow find_perl to work if path has space in.
Add quote_dep for quoting spaces in dependencies.
Add doc for quote_literal.
Insert lots of " to protect spaces in file/dirnames from shell.
Make *PERLRUN macros work with spaces in perl loc.
PERLPREFIX quoting handled with "" not backslash.
Win32 - work in dir-with-space, support gmake.
Win32/dmake, do not test typemap with space, exception if try.