doc update

Author: adumesny

demo/angular/src/app/README.md

@@ -41,14 +41,15 @@ HTML
 ```
 
 ## Demo
-You can see a fuller example at [app.component](https://github.com/gridstack/gridstack.js/blob/master/demo/angular/src/app/app.component.ts).
+You can see a fuller example at [app.component.ts](https://github.com/gridstack/gridstack.js/blob/master/demo/angular/src/app/app.component.ts)
 
 to build the demo, go to demo/angular and run `yarn` + `yarn start` and Navigate to `http://localhost:4200/` 
 
 ### Caveats 
 
  - This wrapper needs v7.1.2+ to run as it needs the latest changes
- - This wrapper handles well ngFor loops, but if you're using a trackBy function (as I would recommend) and no element id change after an update, you must manually call the `Gridstack.update()` method directly.
+ - This wrapper handles well ngFor loops, but if you're using a trackBy function (as I would recommend) and no element id change after an update,
+ you must manually update the `GridstackItemComponent.option` directly - see [modify()](./app.component.ts#L58) example.
  - The original client list of items is not updated to match **content** changes made by gridstack (TBD later), but adding new item or removing (as shown in demo) will update those new items. Client could use change/added/removed events to sync that list if they wish to do so now.
  - Code isn't compiled into a side lib to use right now - you need to copy those files for now. Let me know (slack) if you are using it...
 

demo/index.html

@@ -31,13 +31,15 @@ <h1>Demos</h1>
     <li><a href="web1.html">Website demo 1</a></li>
     <li><a href="web2.html">Website demo 2</a></li>
   </ul>
-  <h1>Angular src Demos</h1>
-  <p>these are complete Angular projects with multiple options. use `yarn` and `yarn start` in demo/angular sub-project to run them</p>
-  <p>You can find the complete source at <a href="https://github.com/gridstack/gridstack.js/tree/master/demo/angular" target="_blank">Angular Demo</a></p>
+  <h1>Angular wrapper</h1>
+  <p>We now ship an <a href="https://github.com/gridstack/gridstack.js/tree/master/demo/angular/src/app" target="_blank">Angular component wrapper</a>
+    to make it supper easy for that framework (Vue and React examples are above)</p>
+  <p>These are complete Angular projects with multiple options. use `yarn` and `yarn start` in <a href="https://github.com/gridstack/gridstack.js/tree/master/demo/angular" target="_blank">demo/angular</a> sub-project to run them</p>
   <ol>
     <li><a href="angular/src/app/simple.ts">simple.ts</a></li>
     <li><a href="angular/src/app/ngFor.ts">ngFor.ts</a></li>
-    <li><a href="angular/src/app/ngFor_cmd.ts">ngFor with command (not recommended)</a></li>
+    <li><a href="angular/src/app/ngFor_cmd.ts">ngFor with command</a> (not recommended)</li>
+    <li><a href="angular/src/app/gridstack.component.ts">gridstack.component.ts</a> (BEST)</li>
   </ol>
   <h1>Old v5.1.1 Jquery Demos</h1>
   Note: those are no longer supported, and use an old version of the lib to compare functionality.