Updated README

Provided explanation for how to use the sample files.

README.md

@@ -1,13 +1,12 @@
 # Dynamics-AX-Extensible-Control-Samples
 Sample code and tutorials for building extensible controls for Microsoft Dynamics AX. Includes code samples for AX Forms, AX Tables, AX Classes, and AX Resources (HTML/JS/CSS).
 
+Note that the files with extension "xpp" are not valid X++ metadata files and cannot be opened using the Microsoft Dynamics AX Visual Studio Tools. These files been stripped of their auto-generated metadata so that the source code is easier to read via Github. To open the files using the Microsoft Dynamics AX Visual Studio Tools, follow the instructions below.
+
 Prerequisites to run the samples 
 - You must have a Microsoft Dynamics AX developer environment (which includes a local AOS deployment). 
 - The developer environment must have the Microsoft Dynamics AX Visual Studio Tools installed. These tools allow writing, viewing, compiling, and deploying the code included in these samples.
 
 To import a sample
-- Download a sample folder.
-- Compress the files in the sample folder into a zip file. 
-- Make sure that the folder named "Project Item" and its sibling folders are all located at the root of the zipped file. 
-- After zipping, rename the file extension from "zip" to "axpp". 
-- Import the sample project into Visual Studio via the menu Dynamics AX > Import Project...
+- Download the repository as ZIP.
+- Import the desired sample project (file with extension "axpp") into Visual Studio via the menu Dynamics AX > Import Project...