Mingw build fixups

- #ident not supported in EzUsb.cpp
- sleep() missing <unistd.h> in LibUsb.cpp

src/EzUsb.h

@@ -19,7 +19,6 @@
  *    along with this program; if not, write to the Free Software
  *    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
  */
-#ident "$Id: ezusb.h,v 1.1 2007/03/19 20:46:30 cfavi Exp $"
 
 
 /*

src/LibUsb.cpp

@@ -21,6 +21,7 @@
 #include <QString>
 #include <QDebug>
 
+#include <unistd.h>
 #include "LibUsb.h"
 #include "Settings.h"
 #include "MainWindow.h"