title: Set default values for headers in Restangular globally
body: <p>How can I set content-type globally in Restangular ?
  <br>
  I can set it for each request using custom method, like this</p>
  
  <pre><code>Restangular.oneUrl("auth").customPOST(), undefined, undefined, {
    'Content-Type': "application/x-www-form-urlencoded; charset=UTF-8"
  }).then(function(resp) {
    // do something with resp;
  });
  </code></pre>
  
  <p>and it works, but I want to set it globally so I don't have to write content type for each request.</p>