Add web front-end and fix API issues

node_modules/rxjs/dist/esm5/internal/operators/takeUntil.js

@@ -0,0 +1,11 @@
+import { operate } from '../util/lift';
+import { createOperatorSubscriber } from './OperatorSubscriber';
+import { innerFrom } from '../observable/innerFrom';
+import { noop } from '../util/noop';
+export function takeUntil(notifier) {
+    return operate(function (source, subscriber) {
+        innerFrom(notifier).subscribe(createOperatorSubscriber(subscriber, function () { return subscriber.complete(); }, noop));
+        !subscriber.closed && source.subscribe(subscriber);
+    });
+}
+//# sourceMappingURL=takeUntil.js.map