Rename Direct I/O library to DirectHW

The Direct I/O library for Mac OS X is now called DirectHW to make sure
people can find it via an internet search.

DirectIO was a generic name for a concept and thus not a good
distinguisher for a library.

Corresponding to flashrom svn r1198.

Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
Acked-by: Idwer Vollering <vidwer@gmail.com>
diff --git a/README b/README
index a714d09..5b1799b 100644
--- a/README
+++ b/README
@@ -87,8 +87,8 @@
 
 To compile and run on Darwin/Mac OS X:
 
- Install DirectIO from coresystems GmbH.
- DirectIO is available at http://www.coresystems.de/en/directio.
+ Install DirectHW from coresystems GmbH.
+ DirectHW is available at http://www.coresystems.de/en/directhw .
 
 To cross-compile on Linux for DOS: