* TkRoot.new and TkToplevel.new accept Wm commands as elements
of a hash argument.
e.g. TkRoot.new(:title=>'App Title')
TkToplevel.new(:parent=>Tk.root, :title=>'XXX', :class=>'ZZZ')
* TkMenu :: add some methods
* TkOptionMenubutton :: bug fix
sample/tktimer2.rb
* add comments about the usage of a TkTimer object.
sample/tkmenubutton.rb
* sample of TkMenubutton and TkOptionMenubutton
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@3979 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
