* ext/tk/lib/tk.rb, ext/tk/lib/tk/canvas.rb, ext/tk/lib/tk/entry.rb,
  ext/tk/lib/tk/frame.rb, ext/tk/lib/tk/image.rb,
  ext/tk/lib/tk/itemconfig.rb, ext/tk/lib/tk/labelframe.rb,
  ext/tk/lib/tk/listbox.rb, ext/tk/lib/tk/menu.rb,
  ext/tk/lib/tk/radiobutton.rb, ext/tk/lib/tk/scale.rb,
  ext/tk/lib/tk/spinbox.rb, ext/tk/lib/tk/text.rb,
  ext/tk/lib/tk/toplevel.rb: improve conversion of option values.
* ext/tk/lib/tkextlib/*: ditto.
* ext/tk/lib/tkextlib/*: update to support ActiveTcl8.4.11.2.
* ext/tk/lib/tkextlib/trofs/*: support Trofs 0.4.3.
* ext/tk/lib/tkextlib/tile/*: support Tile 0.7.2.
* ext/tk/lib/tkextlib/vu/*: support vu 2.3.0.
* ext/tk/lib/tkextlib/tcllib/*: support Tcllib 1.8 (Tklib 0.3).


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8@9447 b2dd03c8-39d4-4d8f-98ff-823fe69b080e