Updated copyright in properties

azchat-web/src/main/resources/azchatMessages.properties

@@ -3,7 +3,7 @@ label.project.subtitle=Demo application for Azure Java SDK
 about.message=A sample application to demonstrate Azure services - SQL Azure, Azure Storage, ServiceBus and Media Service using Azure Java SDK.
 refer.link.message=For more details on Azure Java Support refer to below links:
 label.signIn=Sign In
-label.copyright=Copyright 2015 AzChat
+label.copyright=Copyright 2015 Microsoft Open Technologies, Inc.
 label.compute=Compute
 label.data.services=Data Services
 label.app.services=App Services