-------------------------------
	dosifyPath before opening files
	-------------------------------

If you call
	hsc2hs foo/baz

you get the amazing response:

	'foo' is not recognized as an internal or external command,
	operable program or batch file.

On the other hand
	hsc2hs foo\baz

works fine.  Solution: call dosifyPath before opening or writing the file.


Somehow we should make it less easy to trip up when doing file I/O on
Windows.  And provide a library of path-manipulation primitives.