BUGs:
PRIO - DESCRIPTION
  2  - freedup finds more identical files on nearly each run (WHY?)
  5  - extra file read for hash calculation is done (better during comparison?)


TODOs:
PRIO - DESCRIPTION
  2  - clean up code
  4  - get freedup to pass test9
  5  - add more tests
  5  - make freedup to establish also all symlinks in single pass
