Update readme

Author: subev

grid-webapi-odata-crud/ProductService/readme.txt

@@ -1,5 +1,5 @@
-This sample show a simple OData endpoint using ASP.NET Web API.
+This sample shows a Kendo Grid using simple OData endpoints via ASP.NET Web API to perform CRUD operations.
 
 For more information about this sample, see:
 
-http://www.asp.net/web-api/overview/odata-support-in-aspnet-web-api/creating-an-odata-endpoint
+http://www.asp.net/web-api/overview/odata-support-in-aspnet-web-api/creating-an-odata-endpoint