Copyright (c) 2011, Brian A Madden
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README FOR OS.hs MODULE
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1. Changes

  (07-06-2011): First commit, contains the walk function which will
  traverse a directory tree rooted at d and execute a filter function
  f at each node. The function returns a list of absolute FilePaths
  that pass the filter function. Also in this commit is a test module
  used for testing all of the functions of the OS module.