Add web front-end and fix API issues

node_modules/rxjs/dist/esm5/internal/scheduler/QueueScheduler.js

@@ -0,0 +1,11 @@
+import { __extends } from "tslib";
+import { AsyncScheduler } from './AsyncScheduler';
+var QueueScheduler = (function (_super) {
+    __extends(QueueScheduler, _super);
+    function QueueScheduler() {
+        return _super !== null && _super.apply(this, arguments) || this;
+    }
+    return QueueScheduler;
+}(AsyncScheduler));
+export { QueueScheduler };
+//# sourceMappingURL=QueueScheduler.js.map