fix js error; stream ajax success handler should expect json

app/views/shared/_publisher.html.haml

@@ -19,7 +19,7 @@
       = "(#{@aspect_ids.length} #{t('_aspects').downcase})"
 
   .content_creation
-    = form_for(StatusMessage.new, :remote => true) do |status|
+    = form_for(StatusMessage.new, :remote => true, :html => {"data-type" => "json"}) do |status|
       = status.error_messages
       #file-upload
         = image_tag 'icons/photos.png'

public/javascripts/stream.js

@@ -52,7 +52,6 @@ var Stream = {
     });
 
     $(".new_status_message").live('ajax:success', function(data, json, xhr) {
-      json = $.parseJSON(json);
       WebSocketReceiver.addPostToStream(json.post_id, json.html);
       //collapse publisher
       Publisher.close();