Add web front-end and fix API issues

node_modules/rxjs/dist/esm/internal/Scheduler.js

@@ -0,0 +1,12 @@
+import { dateTimestampProvider } from './scheduler/dateTimestampProvider';
+export class Scheduler {
+    constructor(schedulerActionCtor, now = Scheduler.now) {
+        this.schedulerActionCtor = schedulerActionCtor;
+        this.now = now;
+    }
+    schedule(work, delay = 0, state) {
+        return new this.schedulerActionCtor(this, work).schedule(state, delay);
+    }
+}
+Scheduler.now = dateTimestampProvider.now;
+//# sourceMappingURL=Scheduler.js.map