* riece-ruby.el: Fixed example.

* riece-ruby.el: Fixed example.
(riece-ruby-server-program): New variable.
(riece-ruby-status-alist): New variable.
(riece-ruby-status): Abolished.
(riece-ruby-escaped-data): Renamed from riece-ruby-input.
(riece-ruby-reset-process-buffer): New function.
(riece-ruby-send-exit): New function.
(riece-ruby-filter): Call riece-ruby-run-exit-handler if the
program is exited.
(riece-ruby-run-exit-handler): New function.
(riece-ruby-execute): Don't expect program name.
(riece-ruby-clear): New function.
(riece-ruby-set-exit-handler): New function.

* rubyserv.rb (RubyServ::dispatch_eval): Don't expect program
name; eval under the binding of RubyServ::C.
(RubyServ::dispatch_poll): Don't clear @thr.
(RubyServ::dispatch_exit): New method.