Add web front-end and fix API issues

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

@@ -0,0 +1,13 @@
+import { __read, __spreadArray } from "tslib";
+import { zip as zipStatic } from '../observable/zip';
+import { operate } from '../util/lift';
+export function zip() {
+    var sources = [];
+    for (var _i = 0; _i < arguments.length; _i++) {
+        sources[_i] = arguments[_i];
+    }
+    return operate(function (source, subscriber) {
+        zipStatic.apply(void 0, __spreadArray([source], __read(sources))).subscribe(subscriber);
+    });
+}
+//# sourceMappingURL=zip.js.map