Fixed a variable name

Well, that's embarrassing.

lib/twitter_ebooks/bot.rb

@@ -307,7 +307,7 @@ module Ebooks
     # Updates @user and calls on_user_update.
     def update_myself(new_me = twitter.user)
       @user = new_me if @user.nil? || new_me.id == @user.id
-      @username = user.name
+      @username = user.screen_name
       fire(:user_update)
     end