add new fields to maps

maps.proto

@@ -27,6 +27,10 @@ message MapResponse {
   string Creator = 3;
   int32 GameID = 4;
   int64 Date = 5;
+  int64 CreatedAt = 6;
+  int64 UpdatedAt = 7;
+  int64 Submitter = 8;
+  int64 Thumbnail = 9;
 }
 
 message MapRequest {
@@ -35,12 +39,15 @@ message MapRequest {
   optional string Creator = 3;
   optional int32 GameID = 4;
   optional int64 Date = 5;
+  optional int64 Submitter = 6;
+  optional int64 Thumbnail = 7;
 }
 
 message MapFilter {
   optional string DisplayName = 2;
   optional string Creator = 3;
   optional int32 GameID = 4;
+  optional int64 Submitter = 5;
 }
 
 message MapList {
@@ -58,5 +65,4 @@ message Pagination {
 }
 
 message NullResponse {
-
-}
+}