add chrome frame middleware

oxdjango/middleware.py

@@ -4,9 +4,12 @@
 from shortcuts import HttpErrorJson, render_to_json_response
 
 class ExceptionMiddleware(object):
-
     def process_exception(self, request, exception):
         if isinstance(exception, HttpErrorJson):     
             return render_to_json_response(exception.response)          
         return None
 
+class ChromeFrameMiddleware(object):
+    def process_response(self, request, response):
+        response['X-UA-Compatible'] = 'chrome=1'
+        return response