adds docs, tests unpack_gold_value

lootalot_front/src/AppStorage.js

@@ -61,6 +61,8 @@ export const AppStorage = {
                 this.__initPlayerList(players);
                 this.__initClaimsStore(claims);
             });
+            // TODO: when __initPlayerList won't use promises
+            //.then(_ => this.state.initiated = true);
     },
     __initClaimsStore(data) {
       for (var idx in data) {