• Add the utf8 BOM to this file. Let's hope the CPAN toolchain can cope. If it can't, another
  version of the code will have to be released.
  
• Fix read() and write() so they work on files called '0' (zero). See RT#107754.
  Many thanx to Gregory Kidrenko for the report and patch.
  
• Add t/05.zero.t and t/0 to test the new code.
  
• Reformat the source slightly.