title: TODO comments in rStudio
body: <p>is there a way to list ToDo comments in rstudio?<br>
  Before I used eclipse and really loved to put some <code># TODO I definitely need more unit tests here!</code> comments in my source code.</p>
  
  <p>I could not find this feature in rStudio so far and I was wondering, if there is something like a plugin or maybe an easy way of searching such comments.</p>