README.md in slackistrano-0.0.8 vs README.md in slackistrano-0.0.9

@@ -39,9 +39,10 @@
     set :slack_token, "xxxxxxxxxxxxxxxxxxxxxxxx"
 
 Optionally, override the other slack settings:
 
     set :slack_icon_url,     ->{ 'http://gravatar.com/avatar/885e1c523b7975c4003de162d8ee8fee?r=g&s=40' }
+    set :slack_icon_emoji,   ->{ nil } # will override icon_url
     set :slack_channel,      ->{ '#general' }
     set :slack_username,     ->{ 'Slackistrano' }
     set :slack_run_starting, ->{ true }
     set :slack_run_finished, ->{ true }
     set :slack_run_failed,   ->{ true }