title: Can't make sublimeText gitgutter plugin running on live
body: <p>I installed the GitGutter pluggin in sublimeText2 via Sublime Package Control.</p>
  
  <p>Then, when I open a file which is in a git repository (there is a <code>.git</code> file in the same directory), and modify it (add new line etc.), nothing appears on the gutter (even after saving the changes).</p>
  
  <p>I tried to manually run gitgutter, by typing cmd+shift+P and <code>GitGutter: compare against HEAD</code> and then it shows me the changes on the gutter! But hence, when I do other changes, I always have to run manually <code>Compare against HEAD</code> to display the changes, it does not work in live...</p>
  
  <p>I checked my sublime-setting files, and "live_mode" is <code>true</code>.</p>
  
  <p>Does anybody have an idea of how I could get it work ?</p>
  
  <p>Thank you for your help !</p>