* ext/tk/lib/tk/image.rb: support to create TkImage object without
creating a new image object on Tk.
* ext/tk/lib/tk/menu.rb: use TkCommandNames on create_self()
* ext/tk/lib/tk/root.rb: TkRoot.to_eval() returns '.'.
* ext/tk/lib/tk/text.rb: add methods to create a TkText::IndexString
from (x, y) coords.
* ext/tk/lib/tkextlib/tile.rb: bug fix and update support status.
* ext/tk/lib/tkextlib/tile/*.rb: ditto.
* ext/tk/sample/tkextlib/tile: New demo.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@8291 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* ext/tk/lib/tk.rb: better operation for SIGINT when processing callbacks.
* ext/tk/lib/tk/msgcat.rb: ditto.
* ext/tk/lib/tk/variable.rb: ditto.
* ext/tk/lib/tk/timer.rb: ditto.
* ext/tk/lib/tk/validation.rb: add Tk::ValidateConfigure.__def_validcmd()
to define validatecommand methods easier
* ext/tk/lib/tk.rb (_genobj_for_tkwidget): support autoload Tk ext classes
* ext/tk/lib/tk/canvas.rb and so on: remove the parent widget type check
for items (e.g. canvas items; depends on the class) to avoid some troubles
on Tk extension widget class definition.
* ext/tk/lib/tkextlib/: add Iwidget and TkTable extension support
* ext/tk/sample/tkextlib/: add samples of Iwidget and TkTable
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@6630 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
