title: How to add git file status to vim's statusline?
body: <p>I am using vim-fugitive and adding <code>%{fugitive#statusline()}</code> to the statusline nicely displays the current git branch.</p>
  
  <p>But what about a git file status indicator (like in a <code>git status</code> output)?</p>
  
  <p>For example when an opened file is untracked, staged, clean etc. the indicator would display it in the statusline via '[?]', '[M]', '[C]' or something like that.</p>
  
  <p>How to add such a indicator?</p>