README.rdoc in event_emitter-0.0.1 vs README.rdoc in event_emitter-0.0.2

@@ -30,9 +30,28 @@
 call event
 
   foo.emit :chat, {:user => 'shokai', :message => 'hello!!'}
   # => chat - shokai : hello!!
 
+regist event using "once"
+
+  foo.once :bar do |data|
+    puts data
+  end
+
+call
+
+  foo.emit :bar, 100  # => call only first time
+  foo.emit :bar, 200  # => not call
+
+see samples https://github.com/shokai/event_emitter/tree/master/samples
+
+== TEST:
+
+  % gem install bundler
+  % bundle install
+  % rake test
+
 == LICENSE:
 
 (The MIT License)
 
 Copyright (c) 2012 Sho Hashimoto