title: dropzone.js doesnt upload .doc,.xls,.xlsx file formats
body: <p>i have use dropzone extension to upload images. it work like charm. but i  want to upload document files doc,docx,xls,xlsx. </p>
  
  <pre><code>$this-&gt;widget('ext.dropzone.EDropzone', array(
                       'model' =&gt; $model,
                       'attribute' =&gt; 'image_name',
                       'url' =&gt; Yii::app()-&gt;request-&gt;baseUrl.'/jobMaster/ImageUpload',
                       'mimeTypes' =&gt; array('image/jpeg', 'image/png','image/jpg'),
                       'onSuccess' =&gt; 'succcesupload',
                       //'maxFilesize'=&gt; 5,
                       'options' =&gt; array(
                         'addRemoveLinks'=&gt; true,
                       'removedfile'=&gt; "js:function(file) {
                          var name = file.name;        
                          $.ajax({
                              type: 'POST',
                              url: '".$this-&gt;createUrl('/jobMaster/deleteImageUpload')."',
                              data: 'id='+name,
                              dataType: 'html'
                          });
                          var _ref;
                          return (_ref = file.previewElement) != null ? _ref.parentNode.removeChild(file.previewElement) : void 0;        
                                        }"
                   )
                       ));
  </code></pre>
  
  <p>But i don't know how to change in this widget. </p>
  
  <p>i change </p>
  
  <pre><code>'mimeTypes' =&gt; array('image/jpeg', 'image/png','image/jpg','file/doc','file/xls','file/xlsx','file/docx'),
  </code></pre>
  
  <p>but it doesn't work. Any answer?</p>