* lib_do_one_event() : change default value of the argument
* lib_do_one_event() : returns true/false
* add TclTkLib::EventFlag::NONE ( == 0 )
* add set_no_event_wait() and get_no_event_wait()
* modify MANUAL.euc and README.euc
tk.rb :
* change default value of TkCore.do_one_event argument
* add TkCore.set_no_event_wait(wait) and TkCore.get_no_event_wait
* add Tk.exit ( == destroy root widget )
tkafter.rb :
* rename TkAfter => TkTimer ( TkAfter is an alias name now. )
* set_callback returns self
* continue() raises an exception, if already running or no procedure.
* skip() raises an exception, if not running.
sample/tktimer2.rb
* new sample for TkTimer class.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@3965 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
