Improve UTF8 suport on Ruby/Tk

Hi,

If you are interested in the following ChangeLog, please try it.

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Thu Oct 16 16:40:51 2003 Hidetoshi NAGAI nagai@ai.kyutech.ac.jp

    * ext/tk/lib/tk.rb: 
      Add Tk::EncodedString and Tk::UTF8_String class to support 
      characters using the \uXXXX escape to the UNICODE string.

    * ext/tk/sample/{demos-en,demos-jp}/unicodeout.rb
      new demo-scripts (samples of Tk::UTF8_String)

    * ext/tk/sample/{demos-en,demos-jp}/widget
      add entries for 'unicodeout.rb'


永井 秀利 (九工大 知能情報)
nagai@ai.kyutech.ac.jp