Make JSON requests allow text/javascript content

AFNetworking/AFJSONRequestOperation.m

@@ -63,7 +63,7 @@ + (AFJSONRequestOperation *)JSONRequestOperationWithRequest:(NSURLRequest *)urlR
 }
 
 + (NSSet *)defaultAcceptableContentTypes {
-    return [NSSet setWithObjects:@"application/json", @"text/json", nil];
+    return [NSSet setWithObjects:@"application/json", @"text/json", @"text/javascript", nil];
 }
 
 + (NSSet *)defaultAcceptablePathExtensions {