Haacked/Encourage — pull request #9 by SeriousM (2014-06-26 12:18:51+00:00)
Title: Clear the annotations before adding a new one

I got this behaviour which is somewhat wrong:
![image](https://cloud.githubusercontent.com/assets/462013/3398197/eddd33b6-fd2b-11e3-81d7-a517f0842b90.png)

I _guess_ this change will fix the problem.