Priority:
================
+- Implement rwlock() for SD that takes why and can_steal to replace
+ existing block/lock mechanism. rlock() would allow multiple readers
+ wlock would allow only one writer.
- For Windows disaster recovery see http://unattended.sf.net/
- Add "before=" "olderthan=" to FileSet for doing Base of
unchanged files.
- Implement unmount of USB volumes.
- Look into using Dart for testing
http://public.kitware.com/Dart/HTML/Index.shtml
-