2001-06-07 0.02
  Fixed serious bug in read(), which didn't update the current bucket content
    size when expiring entries. This caused infinite loops in _find() and
    _insert(), which have also been fixed, should anything else ever go wrong
    in a similar way

2000-09-18 0.01, First release
  Only lock file header in _lock(0), rather than whole file
  Factor out code from read() and write() into _insert()
  Only delete clean items from underlying data in delete()
  Add documentation, including README

2000-08-25 0.00_05
  Mostly finish write()
  Fix bug where 'use integer' interfered with safe bucketsize calculation

2000-07-13 0.00_04
  Write pushed out items to underlying data when new items read in
    This caused the file format to change
  Add delete()
  Start work on write()

2000-07-13 0.00_03
  Actually mmap the cache file!
  Attempt to write newly cached items (causing hangups)

2000-07-12 0.00_02
  Start work on read()
  Add accessor methods for config options

2000-07-12 0.00_01
  Actually add some code (new, _set_options, _lock, _unlock)
