Add link to dynamic customization book chapter

Author: govert

Ribbon/Readme.md

@@ -102,6 +102,10 @@ Information related to the Excel 2010 extensions to the ribbon can be found here
 * [Customizing the Office 2010 Backstage View](https://msdn.microsoft.com/en-us/library/office/ee815851.aspx)
 * [Ribbon Extensibility in Office 2010: Tab Activation and Auto-Scaling](https://msdn.microsoft.com/en-us/library/office/ee691834.aspx)
 
+Creating Dynamic Ribbon Customizations
+* [Part 1](https://msdn.microsoft.com/en-us/library/dd548010%28v=office.12%29.aspx)
+* [Part 2](https://msdn.microsoft.com/en-us/library/dd548011%28v=office.12%29.aspx)
+
 Other ribbon-related resources:
 
 * [Ron de Bruin's Excel Tips](http://www.rondebruin.nl/win/s2/win003.htm)
@@ -213,4 +217,4 @@ These are some more aspects of the ribbon extensions and COM object model, not y
 
 * Using COM object model events.
 
-* Transitioning to the main thread (or a macro context) from another thread. Excel-DNA has a helper method `ExcelAsyncUtil.QueueAsMacro` that can be called from another thread or a timer event, to transition to a context where the object model can be reliably used.
+* Transitioning to the main thread (or a macro context) from another thread. Excel-DNA has a helper method `ExcelAsyncUtil.QueueAsMacro` that can be called from another thread or a timer event, to transition to a context where the object model can be reliably used.