Release Name: 0.5.0

Notes:



Changes:
.: 2005-12-17 (release 0.5.0)
   .* Enhances:
      .- Meta-validation check for 'max < min', 'max-ex <= min-ex', and so on.
      .- Many test-cases are added
   .* Changes:
      .- 'Parser' class is renamed to 'YamlParser'
      .- 'PlainParser' class is renamed to 'PlainYamlParser'
      .- YamlParser#set_error_linenums() is renamed to set_errors_linenum()
      .- ValidatorError#<=> added
      .- ParseError class is renamed to YamlSyntaxError