README.md in perfectsched-0.8.10 vs README.md in perfectsched-0.8.11

@@ -1,8 +1,9 @@
 # PerfectSched
 
 [![Build Status](https://travis-ci.org/treasure-data/perfectsched.svg?branch=master)](https://travis-ci.org/treasure-data/perfectsched)
+[![Coverage Status](https://coveralls.io/repos/treasure-data/perfectsched/badge.svg?branch=master&service=github)](https://coveralls.io/github/treasure-data/perfectsched?branch=master)
 
 PerfectSched is a highly available distributed cron built on top of RDBMS.
 
 It provides at-least-once semantics; Even if a worker node fails during process a task, the task is retried by another worker.
 
@@ -83,10 +84,10 @@
     :delay => 30,
     :timezone => 'Asia/Tokyo',
     :next_time => Time.parse('2013-01-01 00:00:00 +0900').to_i,
     :data => data,
   }
-  sc.submit("sched-id", "type1", options)
+  sc.add("sched-id", "type1", options)
 }
 ```
 
 
 ## Writing a worker application