AG-668 Update all README.md to point to appropriate plunker/seed

src/floatingFilter/floatingFilter.jsx

@@ -8,6 +8,7 @@ export default class FloatingFilter extends Component {
         }
     }
 
+    // when does this get called? how to test this?
     onParentModelChanged(parentModel) {
         this.setState({
             parentModel: parentModel

src/index.js

@@ -9,6 +9,10 @@ import "../node_modules/bootstrap/dist/css/bootstrap.css";
 
 import App from "./App";
 
+// only required when using enterprise features
+// import {LicenseManager} from "ag-grid-enterprise/main";
+// LicenseManager.setLicenseKey("<your license key>");
+
 document.addEventListener('DOMContentLoaded', () => {
     render(
         <App/>,