v1.18.0 (#815)

Co-authored-by: Artur Tamazian <artur-tamazian>
Co-authored-by: Javier Gonzalez <javierggt@yahoo.com>

katrain/config.json

@@ -1,7 +1,9 @@
 {
     "engine": {
+        "backend": "",
         "katago": "",
         "altcommand": "",
+        "remote_url": "",
         "model": "katrain/models/kata1-b18c384nbt-s9996604416-d4316597426.bin.gz",
         "humanlike_model": "",
         "config": "katrain/KataGo/analysis_config.cfg",