Event aggregator sample deprecated (#690)

* Deprecation message added to the README

* Deprecation message added to the web parts as well

samples/react-events-aggregator/README.md

@@ -1,5 +1,9 @@
 # SPFx Event Aggregator Sample #
 
+# Important: The event aggregator is deprecated and no longer available in the SharePoint Framework. Please use [dynamic data](https://docs.microsoft.com/en-us/sharepoint/dev/spfx/dynamic-data) instead. #
+
+Following issue [#659](https://github.com/SharePoint/sp-dev-fx-webparts/issues/659), the event aggregator functionality is no longer working. This feature was in ALPHA state and never made it to general availability state. There is a replacement for the event aggregator. Please have a look at the dynamic data functionality and use it instead [https://docs.microsoft.com/en-us/sharepoint/dev/spfx/dynamic-data](https://docs.microsoft.com/en-us/sharepoint/dev/spfx/dynamic-data). There is already a sample in this library [https://github.com/SharePoint/sp-dev-fx-webparts/tree/master/samples/react-events-dynamicdata](https://github.com/SharePoint/sp-dev-fx-webparts/tree/master/samples/react-events-dynamicdata)
+
 ## Summary
 
 This sample shows how we can use the SPFx Event Aggregator to communicate between web parts through broadcasting events utilizing the [Publish–subscribe pattern](https://en.wikipedia.org/wiki/Publish–subscribe_pattern). It enables a webpart or component to raise event (broadcast message) through the SPFx event aggregator and that event is received by other web parts or components that have been subscribed to receive it. 
@@ -34,6 +38,7 @@ Version|Date|Comments
 -------|----|--------
 0.0.1|August 22, 2017 | Initial commit
 0.0.2|March 20, 2018 | Updated to SPFx v1.4.1
+0.0.3|November 18, 2018 | Sample deprecated 
 
 ## Disclaimer
 **THIS CODE IS PROVIDED *AS IS* WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING ANY IMPLIED WARRANTIES OF FITNESS FOR A PARTICULAR PURPOSE, MERCHANTABILITY, OR NON-INFRINGEMENT.**

samples/react-events-aggregator/src/webparts/broadcaster/components/Broadcaster.tsx

@@ -23,6 +23,7 @@ export default class Broadcaster extends React.Component<IBroadcasterProps, IBro
         <div className={styles.container}>
           <div className={`ms-Grid-row ms-bgColor-themeDark ms-fontColor-white ${styles.row}`}>
             <div className="ms-Grid-col ms-u-lg10 ms-u-xl8 ms-u-xlPush2 ms-u-lgPush1">
+              <h1>Important: The event aggregator is deprecated and no longer available in the SharePoint Framework. Please use dynamic data https://docs.microsoft.com/en-us/sharepoint/dev/spfx/dynamic-data instead. See the README.md file for more details.</h1>
               <h2>Event Message: {this.state.eventNumber}</h2>
               <PrimaryButton onClick={this.broadcastData.bind(this)} id="BroadcastButton">
                 Broadcast message

samples/react-events-aggregator/src/webparts/receiver/components/Receiver.tsx

@@ -26,6 +26,7 @@ export default class Receiver extends React.Component<IReceiverProps, IReceiverS
         <div className={styles.container}>
           <div className={`ms-Grid-row ms-bgColor-themeDark ms-fontColor-white ${styles.row}`}>
             <div className="ms-Grid-col ms-u-lg10 ms-u-xl8 ms-u-xlPush2 ms-u-lgPush1">
+              <h1>Important: The event aggregator is deprecated and no longer available in the SharePoint Framework. Please use dynamic data https://docs.microsoft.com/en-us/sharepoint/dev/spfx/dynamic-data instead. See the README.md file for more details.</h1>
               <h2>Received events:</h2>
               {
                 this.state.eventsList.map((item: { index: number, data: number }) => {