Updated readme for new Flags plugin

Signed-off-by: Marty Friedel <1491079+martyf@users.noreply.github.com>

README.md

@@ -1,12 +1,7 @@
 # TinyMCE 5 Example Plugin
 Developed by [Marty Friedel](https://www.martyfriedel.com)
 
-Last updated February 2019
-
-Tested with:
-- TinyMCE 5 RC1 (5.0.0-rc-1-build.3)
-- TinyMCE 5 RC2 (5.0.0-rc-2-build.2-8)
-- TinyMCE 5 Stable 
+Last updated April 2019
 
 ## How to use
 Open **index.html** in a web browser and you're good to go. 
@@ -24,19 +19,34 @@ to get the build files, and update the JS file in the index.html file and you'll
 ## What is where
 **index.html** includes the HTML needed to get up and running, including the TinyMCE init code.
 
-**custom-icons.svg** has two SVG icons that we can reference in the plugin.
+**custom-icons.svg** has two SVG icons that we can reference in the "helloworld" plugin.
 
-**plugins** contains the source code and minified code for the "helloworld" plugin. The init code for TinyMCE is looking 
+**plugins** contains the source code and minified code for the "helloworld" and "flags" plugins. The init code for TinyMCE is looking 
 for the .min.js version of the plugin. If you start tinkering, don't forget to either minify your plugin.js file, or 
 update the TinyMCE init to look for the un-minified file.
 
-## Step by step
+## An introduction to Dialogs
 Take a read of [my article](https://www.martyfriedel.com/blog/tinymce-5-creating-a-plugin-with-a-dialog-and-custom-icons) 
-to show how the plugin got to this stage. This article breaks the process down to:
+to show how the plugin got to this stage. 
+
+This is for the **helloworld** plugin.
+
+This article breaks the process down to:
 1. A basic TinyMCE Plugin structure
 2. Extending the Plugin to display a Dialog using TinyMCE 5's UI components
 3. Updating the Dialog after instantiation
 4. Adding custom SVG icons to TinyMCE for the Plugin to use
 
+## An introduction to AutoCompleter
+Take a read of [this article](https://www.martyfriedel.com/blog/tinymce-5-creating-an-autocomplete-plugin) to show how easy it is to get
+an AutoCompleter plugin up and running. 
+
+This is for the **flags** plugin.
+
+This will help you:
+1. Understand the configuration of the AutoCompleter
+2. Consider where your data needs to come from
+3. Insert your data in to the editor
+
 Don't forget to visit [Tiny's](https://www.tiny.cloud) website to read all of the documentation for TinyMCE. It will be 
 incredibly useful for you when you start writing your own Plugins.