Add json_response() convenience method for all views

er, class-based views anyway

tailbone/views/core.py

@@ -111,6 +111,13 @@ class View(object):
         kwargs.setdefault('can_cancel', True)
         return render_to_response(template, kwargs, request=self.request)
 
+    def json_response(self, data):
+        """
+        Convenience method to return a JSON response.
+        """
+        return render_to_response('json', data,
+                                  request=self.request)
+
     def file_response(self, path):
         """
         Returns a generic FileResponse from the given path