title: grunt plugin grunt-contrib-haml can't handle UTF-8 symbols
body: <p>I add to grunt project 
  <a href="https://npmjs.org/package/grunt-contrib-haml" rel="nofollow">https://npmjs.org/package/grunt-contrib-haml</a></p>
  
  <p>Gruntfile.coffee <a href="http://pastebin.com/JzDrVhrA" rel="nofollow">http://pastebin.com/JzDrVhrA</a></p>
  
  <p>I run <code>grunt</code> command in the terminal</p>
  
  <p>And when I try to change haml file I get this</p>
  
  <pre><code>➜  caslty  grunt
  Running "watch" task
  Waiting...OK
  &gt; File "index.haml" changed.
  
  Running "haml:compile" (haml) task
  Haml error on line 58: Invalid US-ASCII character "\xD0"
      Use --trace for backtrace.
  Warning: Haml error on line 58: Invalid US-ASCII character "\xD0"
      Use --trace for backtrace. Use --force to continue.
  
  Aborted due to warnings.
  Completed in 1.160s at Tue Jul 30 2013 12:48:17 GMT+0300 (EEST) - Waiting...
  OK
  </code></pre>
  
  <p>My haml file <a href="http://pastebin.com/BitjWkjq" rel="nofollow">http://pastebin.com/BitjWkjq</a> containe russian characters. But why haml can't handle UTF8?!</p>
  
  <p>How may I fix this?</p>