Changed message to msg in HttpStatusCode to avoid 2.6 DeprecationWarnings.

piston/resource.py

@@ -169,7 +169,7 @@ class Resource(object):
 
             return resp
         except HttpStatusCode, e:
-            return HttpResponse(e.message, status=e.code)
+            return HttpResponse(e.msg, status=e.code)
 
     @staticmethod
     def cleanup_request(request):

piston/utils.py

@@ -50,8 +50,8 @@ class FormValidationError(Exception):
         self.form = form
 
 class HttpStatusCode(Exception):
-    def __init__(self, message, code=200):
-        self.message = message
+    def __init__(self, msg, code=200):
+        self.msg = msg
         self.code = code
 
 def validate(v_form, operation='POST'):