Add web front-end and fix API issues

node_modules/rxjs/dist/esm5/internal/util/applyMixins.js

@@ -0,0 +1,11 @@
+export function applyMixins(derivedCtor, baseCtors) {
+    for (var i = 0, len = baseCtors.length; i < len; i++) {
+        var baseCtor = baseCtors[i];
+        var propertyKeys = Object.getOwnPropertyNames(baseCtor.prototype);
+        for (var j = 0, len2 = propertyKeys.length; j < len2; j++) {
+            var name_1 = propertyKeys[j];
+            derivedCtor.prototype[name_1] = baseCtor.prototype[name_1];
+        }
+    }
+}
+//# sourceMappingURL=applyMixins.js.map